• The designation for the smallest particle size
  Particle size (general)
  Particle size is a notion introduced for comparings dimensions of solid particles , liquid particles , or gaseous particles .The notion of particle size applies to*Colloidal particles;*Particles in ecology;...
  
  above "colloid" of granular material, regardless of composition.

Places

• Clay Island
  Clay Island
  Clay Island is an uninhabited island within Qikiqtaaluk Region, Nunavut, Canada. An island within an island, it is located in Lake Hazen on Ellesmere Island within Quttinirpaaq National Park. The larger Gatter Island lies off its northern shore....
  
  , Nunavut

• Clay, Alabama
  Clay, Alabama
  Clay is a city in northeastern Jefferson County, Alabama, United States. It is part of the Birmingham–Hoover–Cullman Combined Statistical Area. Local government is run by a mayor and city council. Before incorporation on June 6, 2000, it was a census-designated place...
  
  
• Clay, California
  Clay, California
  Clay is a census-designated place in Sacramento County, California. Clay sits at an elevation of . The 2010 United States census reported Clay's population was 1,195.-Geography:...
  
  
• Clay, Kentucky
  Clay, Kentucky
  Clay is a city in Webster County, Kentucky, United States. The population was 1,179 at the 2000 census. Settled in 1837, the city is named for statesman Henry Clay.-Geography:Clay is located at ....
  
  
• Clay, New York
  Clay, New York
  Clay is a town in Onondaga County, New York, USA. As of the 2000 census, the town had a total population of 58,805, making it Syracuse's largest suburb. The town was named after Henry Clay, statesman....
  
  
• Clay, West Virginia
  Clay, West Virginia
  Clay is a town in and the county seat of Clay County, West Virginia, United States. The population was 593 at the 2000 census. It is the only incorporated town in Clay County.-History:...
  
  
• Clay City, Illinois
  Clay City, Illinois
  Clay City is a village in Clay County, Illinois, United States. The population was 1,000 at the 2000 census.-Geography:Clay City is located at ....
  
  
• Clay City, Indiana
  Clay City, Indiana
  Clay City is a town in Harrison Township, Clay County, Indiana, United States. The population was 861 at the 2010 census. It is part of the Terre Haute Metropolitan Statistical Area.-History:...
  
  
• Clay City, Kentucky
  Clay City, Kentucky
  As of the census of 2000, there were 1,303 people, 543 households, and 367 families residing in the city. The population density was 1,199.5 people per square mile . There were 588 housing units at an average density of 541.3 per square mile . The racial makeup of the city was 99.08% White, 0.23%...
  
  
• Clay City Township, Clay County, Illinois
  Clay City Township, Clay County, Illinois
  Clay City Township is one of twelve townships in Clay County, Illinois, USA. As of the 2000 census, its population was 1,407.-Geography:According to the United States Census Bureau, Clay City Township covers an area of ; of this, or 0.27 percent is water....
  
  
• Clay Center (disambiguation)
• Clay County (disambiguation)
• Clay Township (disambiguation)
• Mount Clay
  Mount Clay
  Mount Clay is a peak located in Thompson and Meserve's Purchase in Coos County in the Presidential Range of the White Mountains of New Hampshire...
  
  , a peak in New Hampshire

• Clay, County Armagh, a townland in County Armagh, Northern Ireland
• Clay, County Down, a townland in County Down, Northern Ireland
• Clay, County Fermanagh, a townland in County Fermanagh, Northern Ireland
• Oxford Clay
  Oxford Clay
  The Oxford Clay Formation is a Jurassic marine sedimentary rock formation underlying much of southeast England, from as far west as Dorset and as far north as Yorkshire. The Oxford Clay is of middle Callovian to lower Oxfordian age and comprises 2 main facies. The lower facies comprises the...
  
  , a geological formation

People

• Clay Morrow
  Clay Morrow
  Clarence "Clay" Morrow is a fictional character in the FX television series Sons of Anarchy. He is played by Ron Perlman. He is the President of the Sons of Anarchy Motorcycle Club, but is also something of a vigilante as he does everything in his power to ensure that drug dealers and rapists stay...
  
  , a character on Sons of Anarchy
• Clay (Pokémon), a character of the Pokémon universe

• Clay Aiken
  Clay Aiken
  Clayton Holmes "Clay" Aiken is an American singer, songwriter, actor, producer and author who began his rise to fame on the second season of the television program American Idol in 2003. RCA Records offered him a recording contract, and his multi-platinum debut album Measure of a Man was released...
  
  , a popular music singer
• Clay Bailey, a character in the animated television series Xiaolin Showdown
• Clay Buchholz
  Clay Buchholz
  Clay Daniel Buchholz pitches for the Boston Red Sox of major league baseball. On September 1, 2007, in just his second major league start, he recorded a no-hitter against the Baltimore Orioles, becoming the third MLB pitcher since 1900 to throw a no-hitter in his first or second start...
  
  , Major League Baseball pitcher for the Boston Red Sox
• Clay Hensley
  Clay Hensley
  Clayton Allen Hensley is a Major League Baseball pitcher for the Miami Marlins.-Early life:Hensley attended Lamar University in Beaumont, where he set a single season record with 127 strikeouts in 100 innings....
  
  , a professional baseball player
• Clay S. Jenkinson
  Clay S. Jenkinson
  Clay Straus Jenkinson is an American humanities Rhodes scholar, Danforth Scholar, and author.-Life:...
  
  , a Rhodes Scholar and popular historical reenactor
• Clay Regazzoni
  Clay Regazzoni
  Gianclaudio Giuseppe "Clay" Regazzoni was a Swiss racing car driver. He competed in Formula One races from 1970 to 1980, winning five Grands Prix. His first win was the Italian Grand Prix at Monza in his debut season, driving for Ferrari. He remained with the Italian team until...
  
  , Swiss racing car driver

• Alfred Borron Clay
  Alfred Borron Clay
  Alfred Borron Clay , was an English painter.Clay was born 3 June 1831 at Walton, near Preston, Lancashire, the second son of the Rev. John Clay, chaplain of Preston gaol, and Henrietta Fielding, his wife. He was educated at the Preston grammar school, but also received instruction from his father...
  
  , artist
• Bryan Clay
  Bryan Clay
  Bryan Ezra Tsumoru Clay is an American decathlete. He is the reigning Olympic champion for the decathlon and was also World champion in 2005.-Biography:...
  
  , the Gold Medalist in the Decathlon for the 2008 Summer Olympics in Beijing
• Cassius Clay, the original name of famed boxer Muhammad Ali
• Cassius Marcellus Clay, American politician, abolitionist
• Cassius Marcellus Clay, Sr.
  Cassius Marcellus Clay, Sr.
  Cassius Marcellus Clay, Sr. was the father of American three-time World Heavyweight Champion Muhammad Ali and Rudolph Valentino Clay, who is now named Rahman Ali, and also was the grandfather of Muhammad's daughter Laila Ali. He married Odessa Grady Clay in the 1930s and worked as a painter and a...
  
  , American painter and musician
• Edward Sneyd Clay
  Edward Sneyd Clay
  Edward Sneyd Clay was an officer of the Royal Navy who served during the American War of Independence, and the French Revolutionary and Napoleonic Wars.Clay entered the navy just before the end of the American War of Independence...
  
   (c. 1768-1846), British naval officer
• Edward Clay
  Edward Clay
  Sir Edward Clay KCMG is a retired British diplomat, formerly a High Commissioner and ambassador.During his time as British High Commissioner in Kenya, Sir Edward earned a reputation for his willingness to speak out against corruption at high levels of the Kenyan government...
  
   (b. 1945), British diplomat
• Eric Clay
  Eric Clay
  Eric Clay was a British rugby league referee popularly known as "Sergeant Major" for his style during games.- Early life, private life :Born in Leeds, Yorkshire, Clay was married with two daughters...
  
  , British rugby league referee
• Henry Clay
  Henry Clay
  Henry Clay, Sr. , was a lawyer, politician and skilled orator who represented Kentucky separately in both the Senate and in the House of Representatives...
  
  , a leading American statesman and orator
• Lacy Clay, U.S. House Representative
• Lucius D. Clay
  Lucius D. Clay
  General Lucius Dubignon Clay was an American officer and military governor of the United States Army known for his administration of Germany immediately after World War II. Clay was deputy to General Dwight D. Eisenhower, 1945; deputy military governor, Germany 1946; commander in chief, U.S....
  
  , an American general and military governor
• Meilani Clay
  Meilani Clay
  Meilani Clay is a conscious writer, educator and poetry slam champion from the San Francisco Bay Area, California. She emerged as part of Youth Speaks, a youth performance poetry and creative writing program founded in 1996, and served on SPOKES , a Youth Advisory Board and paid internship...
  
   (b. 1988) American poetry slam champion
• Philippe Clay
  Philippe Clay
  Philippe Clay, born Philippe Mathevet, was a French mime artist, singer and actor.He was known for his tall and slim silhouette and for his interpretations of songs by Charles Aznavour, Claude Nougaro, Jean-Roger Caussimon, Boris Vian, Serge Gainsbourg, Jean Yanne, Léo Ferré, Jacques Datin,...
  
  , a French singer

Other uses

• "Clay" (short story)
  Clay (short story)
  Clay is a short story by James Joyce published in his 1914 collection Dubliners.-The story:Maria, a spinster with a minor job in a rescue mission for wayward women, is looking forward to a holiday evening at the house of Joe, whom she nursed when he was a boy and of whom she is still very fond...
  
  , by James Joyce
• Clay (novel)
  Clay (novel)
  Clay is a children's/young adult novel by David Almond, published in 2005. It was shortlisted for the Carnegie Medal and longlisted for the Guardian Children's Fiction Prize.It was adapted for television in 2008, and aired on BBC One on March 30 2008....
  
  , by David Almond
• Clay (musical)
  Clay (musical)
  Clay is a 2008 Hip-hop musical loosely based on Shakespeare's Henry IV, Parts 1 and 2 and Falstaff written and performed by Matt Sax. The first performance was at the Edinburgh Festival Fringe.-Synopsis:...
  
  , a 2008 hiphop musical by Matt Sax
• Clay Mathematics Institute
  Clay Mathematics Institute
  The Clay Mathematics Institute is a private, non-profit foundation, based in Cambridge, Massachusetts. The Institute is dedicated to increasing and disseminating mathematical knowledge. It gives out various awards and sponsorships to promising mathematicians. The institute was founded in 1998...
  
  
• Clay Records
  Clay Records
  Clay Records was an independent record label founded by Mike Stone in 1980 out of a record shop in the English city of Stoke-on-Trent.-History:...
  
  , a record label
• Clay court
  Clay court
  A clay court is one of the four different types of tennis court. Clay courts are made of crushed shale, stone or brick. The red clay is slower than the green, or Har-Tru "American" clay. The French Open uses clay courts, making it unique among the Grand Slam tournaments.Clay courts are more common...
  
  , one of the types of tennis court.
• Clay (industrial plasticine)
  Clay (industrial plasticine)
  Industrial plasticine is a modeling material which is mainly used by automotive design studios. It was developed as an industrial version of plasticine or hobby clay....
  
  
• Clay (1965 film)
  Clay (1965 film)
  Clay is a 1965 Australian drama film directed by Giorgio Mangiamele. The film was nominated for the Golden Palm award at the 1965 Cannes Film Festival, but it lost to The Knack ...and How to Get It.-Plot:...
  
  , a 1965 Australian film
• Clay (2008 film)
  Clay (2008 film)
  Clay is a 2008 British TV film drama directed by Andrew Gunn and starring Harry McEntire and Ben Davies .The screenplay by Peter Tabern is based on the 1998 novel of the same name by David Almond.-Plot:...
  
  , a 2008 film based on the novel by David Almond
• Clay moths, several fairly unrelated species (though most are of family Noctuidae
  Noctuidae
  The Noctuidae or owlet moths are a family of robustly-built moths that includes more than 35,000 known species out of possibly 100,000 total, in more than 4,200 genera. They constitute the largest family in the Lepidoptera....
  
  ):
  • Eugnorisma depuncta
    Eugnorisma depuncta
    The Plain Clay is a moth of the Noctuidae family. It is found in most of Europe, west to England, north to Scotland and Fennoscandia, south to Southern France, Italy, Sicily and Greece, east up to the Caucasus. It is not present in Northern France, the Benelux and parts of western Germany.The...
    
    (Plain Clay) and several Diarsia
    Diarsia
    Diarsia is a genus of moths of the Noctuidae family.-Species:*The hoenei species group**Diarsia acutipennis Boursin, 1954**Diarsia caradjai Boursin, 1954**Diarsia claudia Boursin, 1963**Diarsia excelsa Hreblay et Ronkay, 1998...
    
    and Xestia
    Xestia
    Xestia is a genus of noctuid moths . They are the type genus of the tribe Xestiini in subfamily Noctuinae, though some authors merge this tribe with the Noctuini. Species in this genus are commonly known as "clay", "dart" or "rustic", but such names are commonplace among Noctuidae...
    
    species (Noctuinae)
  • Mythimna ferrago (The Clay, Hadeninae)
  • Paracolax tristalis
    Paracolax tristalis
    The Clay Fan-foot is a moth of the family Noctuoidea. It is found in the Palearctic ecozone.The wingspan is 28–35 mm. The moth flies from June to August depending on the location....
    
    (Clay Fan-foot, Herminiinae)
  • Cyclophora linearia
    Cyclophora linearia
    The Clay Triple-lines is a moth of the Geometridae family. The species can be found in Europe.The wingspan is 26–33 mm. The moths fly from May to July depending on the location.The larvae feed on Beech....
    
    (Clay Triple-lines, family Geometridae)