{ } a. 1. Of or relating to biology. -- Bi`o*log"ic*al*ly, adv. [1913 Webster]
2. related by blood; -- of parents and children; -- contrasted with adoptive, adopted, or foster; as, Mary was adopted directly from the maternity hospital and never met her biological mother. Syn. -- biologic. [WordNet 1.5]
n. [ Gr. bi`os life + -logy: cf. F. biologie. ] The science of life; that branch of knowledge which treats of living matter as distinct from matter which is not living; the study of living tissue. It has to do with the origin, structure, development, function, and distribution of animals and plants. [ 1913 Webster ]
n. [ Gr. bi`os life + luminescence. ] a type of luminescence produced by biological or biochemical processes, such as a glowworm glow or the action of luciferase on luciferin. A well-known example is that of firefly luminescence. See also luciferin. [ PJC ]
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