Biology \Bi*ol"o*gy\, n. [Gr. ? 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.

Source: Webster's Revised Unabridged Dictionary (1913)