Anatomy

• Ampulla of Vater 
• Auerbach's plexus
  Auerbach's plexus
  A part of the enteric nervous system, Auerbach's plexus , exists between the longitudinal and circular layers of muscularis externa in the gastrointestinal tract and provides motor innervation to both layers of the mucosa, having both parasympathetic and sympathetic input, whereas Meissner's plexus...
  
   
• Brodmann's areas 
• Canals of Hering
  Canals of Hering
  The Canals of Hering, or intrahepatic bile ductules, are part of the outflow system of exocrine bile product from the liver.-Anatomy:They are found between the bile canaliculi and interlobular bile ducts near the outer edge of a classic liver lobule...
  
   
• Crypts of Lieberkühn
  Crypts of Lieberkühn
  In histology, an intestinal crypt is a gland found in the epithelial lining of the small intestine and colon...
  
   
• Duct of Wirsung 
• Hesselbach's triangle 
• Hurthle cell
  Hurthle cell
  A Hürthle cell is a cell in the thyroid that is often associated with Hashimoto's thyroiditis as well as follicular thyroid cancer.-Histology:...
  
   
• Islets of Langerhans
  Islets of Langerhans
  The islets of Langerhans are the regions of the pancreas that contain its endocrine cells. Discovered in 1869 by German pathological anatomist Paul Langerhans at the age of 22, the islets of Langerhans constitute approximately 1 to 2% of the mass of the pancreas...
  
   
• Kiesselbach's plexus
  Kiesselbach's plexus
  Kiesselbach's area, also Kiesselbach's plexus, Kiesselbach's triangle, and Little's area, is a region in the anteroinferior part of the nasal septum, where four arteries anastomose to form a vascular plexus called Kiesselbach's plexus...
  
   
• Krause's end-bulbs 
• Kupffer cells 
• Langhans giant cell
  Langhans giant cell
  Langhans giant cells are large cells found in granulomatous conditions.They are formed by the fusion of epithelioid cells , and contain nuclei arranged in a horseshoe-shaped pattern in the cell periphery....
  
   
• Langerhans cell
  Langerhans cell
  Langerhans cells are dendritic cells of the skin and mucosa, and contain large granules called Birbeck granules. They are present in all layers of the epidermis, but are most prominant in the stratum spinosum. They also occur in the papillary dermis, particularly around blood vessels, as well as...
  
   
• Lissauer's tract 
• Loop of Henle
  Loop of Henle
  In the kidney, the loop of Henle is the portion of a nephron that leads from the proximal convoluted tubule to the distal convoluted tubule. Named after its discoverer F. G. J...
  
   
• Meibomian glands 
• Meissner's corpuscle
  Meissner's corpuscle
  Meissner's corpuscles are a type of mechanoreceptor. They are a type of nerve ending in the skin that is responsible for sensitivity to light touch. In particular, they have highest sensitivity when sensing vibrations lower than 50 Hertz...
  
   
• Meissner's plexus 
• Merkel cell
  Merkel cell
  Merkel cells or Merkel-Ranvier cells are oval receptor cells found in the skin of vertebrates that have synaptic contacts with somatosensory afferents. They are associated with the sense of light touch discrimination of shapes and textures. They can turn malignant and form the skin tumor known as...
  
   
• Müllerian ducts 
• Nissl bodies 
• Rathke's pouch
  Rathke's pouch
  In embryogenesis, Rathke's pouch is a depression in the roof of the developing mouth in front of the buccopharyngeal membrane. It gives rise to the anterior pituitary , a part of the endocrine system.-Development:...
  
   
• Rokitansky-Aschoff sinuses
  Rokitansky-Aschoff sinuses
  Rokitansky-Aschoff sinuses, also entrapped epithelial crypts, are diverticula or pockets in the wall of the gallbladder. They may be microscopic or macroscopic....
  
   
• Spiral valves of Heister
  Spiral valves of Heister
  Spiral valves of Heister are undulating folds or valves in the proximal mucosa of the cystic duct. The cystic duct attaches the gallbladder to the common bile duct....
  
   
• Virchow's node
  Virchow's node
  Virchow's node is a lymph node in the left supraclavicular fossa . It takes its supply from lymph vessels in the abdominal cavity...
  
   
• Wernicke's area
  Wernicke's area
  Wernicke's area is one of the two parts of the cerebral cortex linked since the late nineteenth century to speech . It is involved in the understanding of written and spoken language...
  
   
• Wolffian duct
  Wolffian duct
  The mesonephric duct is a paired organ found in mammals including humans during embryogenesis....
  
   
• Zonule of Zinn
  Zonule of Zinn
  The zonule of Zinn is a ring of fibrous strands connecting the ciliary body with the crystalline lens of the eye....
  
   

Chemistry

• Aspirin
  Aspirin
  Aspirin , also known as acetylsalicylic acid , is a salicylate drug, often used as an analgesic to relieve minor aches and pains, as an antipyretic to reduce fever, and as an anti-inflammatory medication. It was discovered by Arthur Eichengrun, a chemist with the German company Bayer...
  
   
• Bohrium
  Bohrium
  Bohrium is a chemical element with the symbol Bh and atomic number 107 and is the heaviest member of group 7 .It is a synthetic element whose most stable known isotope, 270Bh, has a half-life of 61 seconds...
  
   
• Darmstadtium
  Darmstadtium
  Darmstadtium is a chemical element with the symbol Ds and atomic number 110. It is placed as the heaviest member of group 10, but no known isotope is sufficiently stable to allow chemical experiments to confirm its placing in that group...
  
   
• Eupione
  Eupione
  Eupione, or eupion, is a hydrocarbon of the paraffin series, probably a pentane, C5H12, discovered by Carl Reichenbach in wood tar. It is also formed in the destructive distillation of many substances, as wood, coal, caoutchouc, bones, resin and the fixed oils. It is a colorless, highly volatile...
  
   
• Germanium
  Germanium
  Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. The isolated element is a semiconductor, with an appearance most similar to elemental silicon....
  
   
• Glauber's salt 
• Hassium
  Hassium
  Hassium is a synthetic element with the symbol Hs and atomic number 108. It is the heaviest member of the group 8 elements. The element was first observed in 1984...
  
   
• Indium
  Indium
  Indium is a chemical element with the symbol In and atomic number 49. This rare, very soft, malleable and easily fusible post-transition metal is chemically similar to gallium and thallium, and shows the intermediate properties between these two...
  
   
• Meitnerium
  Meitnerium
  Meitnerium is a chemical element with the symbol Mt and atomic number 109. It is placed as the heaviest member of group 9 in the periodic table but a sufficiently stable isotope is not known at this time which would allow chemical experiments to confirm its position, unlike its lighter...
  
   
• Paraffin
  Paraffin
  In chemistry, paraffin is a term that can be used synonymously with "alkane", indicating hydrocarbons with the general formula CnH2n+2. Paraffin wax refers to a mixture of alkanes that falls within the 20 ≤ n ≤ 40 range; they are found in the solid state at room temperature and begin to enter the...
  
   
• Phenol
  Phenol
  Phenol, also known as carbolic acid, phenic acid, is an organic compound with the chemical formula C6H5OH. It is a white crystalline solid. The molecule consists of a phenyl , bonded to a hydroxyl group. It is produced on a large scale as a precursor to many materials and useful compounds...
  
   
• Pittacal
  Pittacal
  Pittacal was the first synthetic dyestuff to be produced commercially. It was accidentally discovered by German chemist Carl Ludwig Reichenbach in 1832, who was also the discoverer of kerosene, phenol, eupion, paraffin and creosote....
  
   
• Roentgenium
  Roentgenium
  Roentgenium is a synthetic radioactive chemical element with the symbol Rg and atomic number 111. It is placed as the heaviest member of the group 11 elements, although a sufficiently stable isotope has not yet been produced in a sufficient amount that would confirm this position as a heavier...
  
   

Computing

• Chip card 
• modern Binary numeral system
  Binary numeral system
  The binary numeral system, or base-2 number system, represents numeric values using two symbols, 0 and 1. More specifically, the usual base-2 system is a positional notation with a radix of 2...
  
   
• MP3
  MP3
  MPEG-1 or MPEG-2 Audio Layer III, more commonly referred to as MP3, is a patented digital audio encoding format using a form of lossy data compression...
  
   
• Plankalkül
  Plankalkül
  Plankalkül is a computer language designed for engineering purposes by Konrad Zuse between 1943 and 1945. It was the first high-level non-von Neumann programming language to be designed for a computer. Also, notes survive with scribblings about such a plan calculation dating back to 1941...
  
  
• Z3 (computer)

Engineering

• Diesel engine
  Diesel engine
  A diesel engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber...
  
   
• Tachometer
  Tachometer
  A tachometer is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute on a calibrated analogue dial, but digital displays are increasingly common...
  
   
• Toepler pump
  Toepler pump
  A Toepler pump is a form of mercury piston pump, invented by August Toepler in 1850.The principle is illustrated in the diagram. When reservoir G is lowered, bulb B and tube T are filled with gas from the enclosure being evacuated . When G is raised, mercury rises in tube F and cuts off the gas in...
  
   
• V-2
• Wankel engine
  Wankel engine
  The Wankel engine is a type of internal combustion engine using an eccentric rotary design to convert pressure into a rotating motion instead of using reciprocating pistons. Its four-stroke cycle takes place in a space between the inside of an oval-like epitrochoid-shaped housing and a rotor that...
  
  
• Printing Press
  Printing press
  A printing press is a device for applying pressure to an inked surface resting upon a print medium , thereby transferring the ink...
  
  

Military

• The modern flamethrower
  Flamethrower
  A flamethrower is a mechanical device designed to project a long controllable stream of fire.Some flamethrowers project a stream of ignited flammable liquid; some project a long gas flame. Most military flamethrowers use liquids, but commercial flamethrowers tend to use high-pressure propane and...
  
   
• Submachine gun
  Submachine gun
  A submachine gun is an automatic carbine, designed to fire pistol cartridges. It combines the automatic fire of a machine gun with the cartridge of a pistol. The submachine gun was invented during World War I , but the apex of its use was during World War II when millions of the weapon type were...
  
   
• The modern assault rifle
  Assault rifle
  An assault rifle is a selective fire rifle that uses an intermediate cartridge and a detachable magazine. Assault rifles are the standard infantry weapons in most modern armies...
  
   
• Jet-powered fighter aircraft
• Ballistic missile
  Ballistic missile
  A ballistic missile is a missile that follows a sub-orbital ballistic flightpath with the objective of delivering one or more warheads to a predetermined target. The missile is only guided during the relatively brief initial powered phase of flight and its course is subsequently governed by the...
  
   
• Rifling
  Rifling
  Rifling is the process of making helical grooves in the barrel of a gun or firearm, which imparts a spin to a projectile around its long axis...
  
   

Physics

• Stark effect
  Stark effect
  The Stark effect is the shifting and splitting of spectral lines of atoms and molecules due to presence of an external static electric field. The amount of splitting and or shifting is called the Stark splitting or Stark shift. In general one distinguishes first- and second-order Stark effects...
  
   
• Stark spectroscopy
  Stark spectroscopy
  Stark spectroscopy is a form of spectroscopy based on the Stark effect. In brief, this technique makes use of the Stark effect either to reveal information about the physiochemical or physical properties of a sample using a well-characterized electric field or to reveal information about an...
  
   

Religion

• Christmas tree
  Christmas tree
  The Christmas tree is a decorated evergreen coniferous tree, real or artificial, and a tradition associated with the celebration of Christmas. The tradition of decorating an evergreen tree at Christmas started in Livonia and Germany in the 16th century...
  
   
• Protestantism
  Protestantism
  Protestantism is one of the three major groupings within Christianity. It is a movement that began in Germany in the early 16th century as a reaction against medieval Roman Catholic doctrines and practices, especially in regards to salvation, justification, and ecclesiology.The doctrines of the...
  
   

Science

• Bark scale
  Bark scale
  The Bark scale is a psychoacoustical scale proposed by Eberhard Zwicker in 1961. It is named after Heinrich Barkhausen who proposed the first subjective measurements of loudness....
  
   
• Bergius process
  Bergius process
  The Bergius Process is a method of production of liquid hydrocarbons for use as synthetic fuel by hydrogenation of high-volatile bituminous coal at high temperature and pressure...
  
   
• Bunsen burner
  Bunsen burner
  A Bunsen burner, named after Robert Bunsen, is a common piece of laboratory equipment that produces a single open gas flame, which is used for heating, sterilization, and combustion.- Operation:...
  
   
• Diene synthesis 
• Electromagnetic radiation
  Electromagnetic radiation
  Electromagnetic radiation is a form of energy that exhibits wave-like behavior as it travels through space...
  
   
• Fahrenheit temperature scale
  Fahrenheit
  Fahrenheit is the temperature scale proposed in 1724 by, and named after, the German physicist Daniel Gabriel Fahrenheit . Within this scale, the freezing of water into ice is defined at 32 degrees, while the boiling point of water is defined to be 212 degrees...
  
   
• Gauss
  Gauss (unit)
  The gauss, abbreviated as G, is the cgs unit of measurement of a magnetic field B , named after the German mathematician and physicist Carl Friedrich Gauss. One gauss is defined as one maxwell per square centimeter; it equals 1 tesla...
  
   
• Geiger counter
  Geiger counter
  A Geiger counter, also called a Geiger–Müller counter, is a type of particle detector that measures ionizing radiation. They detect the emission of nuclear radiation: alpha particles, beta particles or gamma rays. A Geiger counter detects radiation by ionization produced in a low-pressure gas in a...
  
   
• Geiger–Müller tube
  Geiger–Müller tube
  A Geiger–Müller tube is the sensing element of a Geiger counter instrument that can detect a single particle of ionizing radiation, and typically produce an audible click for each. It was named for Hans Geiger who invented the device in 1908, and Walther Müller who collaborated with Geiger in...
  
   
• General relativity
  General relativity
  General relativity or the general theory of relativity is the geometric theory of gravitation published by Albert Einstein in 1916. It is the current description of gravitation in modern physics...
  
   
• Haber process
  Haber process
  The Haber process, also called the Haber–Bosch process, is the nitrogen fixation reaction of nitrogen gas and hydrogen gas, over an enriched iron or ruthenium catalyst, which is used to industrially produce ammonia....
  
   
• Hertz
  Hertz
  The hertz is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of the sine wave, particularly those used in radio and audio applications....
  
   
• Ohm 
• Petri dish
  Petri dish
  A Petri dish is a shallow glass or plastic cylindrical lidded dish that biologists use to culture cells or small moss plants. It was named after German bacteriologist Julius Richard Petri, who invented it when working as an assistant to Robert Koch...
  
   
• Planck units
  Planck units
  In physics, Planck units are physical units of measurement defined exclusively in terms of five universal physical constants listed below, in such a manner that these five physical constants take on the numerical value of 1 when expressed in terms of these units. Planck units elegantly simplify...
  
   
• Quantum mechanics
  Quantum mechanics
  Quantum mechanics, also known as quantum physics or quantum theory, is a branch of physics providing a mathematical description of much of the dual particle-like and wave-like behavior and interactions of energy and matter. It departs from classical mechanics primarily at the atomic and subatomic...
  
   
• Röntgen
  Röntgen
  The roentgen is a unit of measurement for exposure to ionizing radiation , and is named after the German physicist Wilhelm Röntgen...
  
   
• Siemens
  Siemens (unit)
  The siemens is the SI derived unit of electric conductance and electric admittance. Conductance and admittance are the reciprocals of resistance and impedance respectively, hence one siemens is equal to the reciprocal of one ohm, and is sometimes referred to as the mho. In English, the term...
  
   
• Special relativity
  Special relativity
  Special relativity is the physical theory of measurement in an inertial frame of reference proposed in 1905 by Albert Einstein in the paper "On the Electrodynamics of Moving Bodies".It generalizes Galileo's...
  
   
• Uncertainty principle
  Uncertainty principle
  In quantum mechanics, the Heisenberg uncertainty principle states a fundamental limit on the accuracy with which certain pairs of physical properties of a particle, such as position and momentum, can be simultaneously known...
  
   
• Weber
  Weber (unit)
  In physics, the weber is the SI unit of magnetic flux. A flux density of one Wb/m2 is one tesla.The weber is named for the German physicist Wilhelm Eduard Weber .- Definition :...
  
   
• X-ray crystallography
  X-ray crystallography
  X-ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X-rays strikes a crystal and causes the beam of light to spread into many specific directions. From the angles and intensities of these diffracted beams, a crystallographer can produce a...
  
   

Transportation

• Automobile
  Automobile
  An automobile, autocar, motor car or car is a wheeled motor vehicle used for transporting passengers, which also carries its own engine or motor...
  
  : invented by Karl Benz
  Karl Benz
  Karl Friedrich Benz, was a German engine designer and car engineer, generally regarded as the inventor of the gasoline-powered car, and together with Bertha Benz pioneering founder of the automobile manufacturer Mercedes-Benz...
  
   
• Petroleum-powered motorcycle
  Daimler Reitwagen
  The Daimler Reitwagen or Einspur was a motor vehicle made by Gottlieb Daimler and Wilhelm Maybach in 1885, and is widely recognized as the first motorcycle. Daimler is often called "the father of the motorcycle" for this invention...
  
  
• Zeppelin
  Zeppelin
  A Zeppelin is a type of rigid airship pioneered by the German Count Ferdinand von Zeppelin in the early 20th century. It was based on designs he had outlined in 1874 and detailed in 1893. His plans were reviewed by committee in 1894 and patented in the United States on 14 March 1899...