- A compound produced by the mixing of two or more chemicals.
- A compound formed by the fusion of two molecules (or, less often, atoms) which are then held together by a coordinate covalent bond.
- A complex that forms when a chemical binds to a biological molecule, such as DNA or protein.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.