Chemistry or biochemistry

• Monomer
  Monomer
  A monomer is an atom or a small molecule that may bind chemically to other monomers to form a polymer; the term "monomeric protein" may also be used to describe one of the proteins making up a multiprotein complex...
  
  
• Dimer
  Dimer
  A dimer is a chemical entity consisting of two structurally similar subunits called monomers joined by bonds that can be either strong or weak.- Organic chemistry :...
  
  
• Trimer
  Trimer
  Trimer might refer to:* Trimer , a reaction product composed of three identical molecules* Protein trimer, a compound of three macromolecules non-covalently bound* Trimer, Ille-et-Vilaine, a commune in France-See also:...
  
  
• Tetramer
  Tetramer
  A tetramer is a protein with four subunits . There are homotetramers such as glutathione S-transferase or single-strand binding protein, dimers of hetero-dimers such as hemoglobin , and heterotetramers, where each subunit is different.-Subunit interactions in tetramers:The interactions between...
  
  
• Pentamer
  Pentamer
  A pentamer is a thing composed out of five sub-units.In chemistry, it applies to molecules made of five monomers.In biochemistry, it applies to macromolecules, in particular to pentameric proteins, made of five proteic sub-units....
  
  
• Hexamer
  Hexamer
  A hexamer is a thing composed out of six sub-units.In microbiology, a hexamer is one of the proteins composing the polyhedral protein shell that encloses the bacterial micro-compartments known as carboxysomes....
  
  
• Heptamer
  Heptamer
  -See also:* Heptameria, a genus of fungi in the class Dothideomycetes* Heptaméron, a collection of 72 short stories written in French by Marguerite of Navarre and published in 1558* Hepta, a prefix* -mer, an affix...
  
  
• Octamer
• Nonamer
• Decamer
  Decamer
  -See also:* Decameron * deca-, a prefix* -mer, an affix...
  
  
• Dodecamer
  Dodecamer
  Dodecameric is a term pertaining to protein quaternary structure, and describes a protein complex with 12 protein subunits . Dodecameric complexes can have a number of subunit 'topologies', but typically only a few of the theoretically possible subunit arrangements are observed in protein...
  
  
• Oligomer
  Oligomer
  In chemistry, an oligomer is a molecule that consists of a few monomer units , in contrast to a polymer that, at least in principle, consists of an unlimited number of monomers. Dimers, trimers, and tetramers are oligomers. Many oils are oligomeric, such as liquid paraffin...
  
  
• Polymer
  Polymer
  A polymer is a large molecule composed of repeating structural units. These subunits are typically connected by covalent chemical bonds...
  
  
• Enantiomer
  Enantiomer
  In chemistry, an enantiomer is one of two stereoisomers that are mirror images of each other that are non-superposable , much as one's left and right hands are the same except for opposite orientation. It can be clearly understood if you try to place your hands one over the other without...
  
  
• Heteromer
  Heteromer
  -Pharmacology:* Ligand-gated ion channels such as the nicotinic acetylcholine receptor and GABAA receptor are composed of five subunits arranged around a central pore that opens to allow ions to pass through. There are a large number of different subunits available, which can come together in a...
  
  

• Isomer
  Isomer
  In chemistry, isomers are compounds with the same molecular formula but different structural formulas. Isomers do not necessarily share similar properties, unless they also have the same functional groups. There are many different classes of isomers, like stereoisomers, enantiomers, geometrical...
  
  

Biology

• Merosity
  Merosity
  Merosity is the number of component parts in each whorl of a plant structure. It is most commonly used in the context of flowers, in which case it refers to the number of sepals in the calyx, the number of petals in the corolla, and the number of stamens in each whorl of the androecium...
  
  , a characteristic regarding the flower petals number in plants
• Metamery, a characteristic of segmented animals