/ Dictionary / Index E ectozoic: Meaning and Definition of Find definitions for: ec•to•zo•ic Pronunciation: (ek"tu-zō'ik), [key] — adj. (of a parasitic animal) living on the surface of its host. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ectozoan ectozoon Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language