a bedded, blanketlike sedimentary deposit of organic origin built by marine organisms and including shell beds, flat reefs, and corals.
a rock layer consisting of a deposit of organic material, such as fossils
noun the use of live sterile maggots to treat patients with infected wounds
the formation of chemical compounds by a living organism. the laboratory preparation of biological molecules by the use of reagents or catalysts derived from natural substances and modeled on a series of reactions occurring in a living organism. noun the formation of complex compounds from simple substances by living organisms bi’o·syn·thet’ic (-thět’ĭk) adj.
of, relating to, or characterized by biosynthesis, the formation of chemical compounds by a living organism, or a laboratory process modeled after these reactions in living organisms. of or relating to a substance produced by a biosynthetic process.