Etymology
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biological (adj.)

"pertaining to the science of life," 1840, from biology + -ical. Biological clock, "innate mechanism that regulates cyclic activities of living things," is attested from 1955; not especially of human reproductive urges until c. 1991. Biological warfare is from 1946. Related: Biologically. Alternative adjective biologic is from 1850.

updated on July 01, 2017

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Definitions of biological from WordNet

biological (adj.)
(of a parent or child) related by blood; genetically related;
biological child
Synonyms: natural
biological (adj.)
pertaining to biology or to life and living things;
Synonyms: biologic
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.