/ Dictionary / Index E ectogenous: Meaning and Definition of Find definitions for: ec•tog•e•nous Pronunciation: (ek-toj'u-nus), [key] — adj. growing outside the body of the host, as certain bacteria and other parasites. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ectogenesis ectomere Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language