/ Dictionary / Index O ontogeny: Meaning and Definition of Find definitions for: on•tog•e•ny Pronunciation: (on-toj'u-nē), [key] — n. Biol. the development or developmental history of an individual organism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ontogeny (Thesaurus) onto function ontological argument Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language