/ Dictionary / Index E ectozoan: Meaning and Definition of Find definitions for: ec•to•zo•an Pronunciation: (ek"tu-zō'un), [key] — Biol. Biol. —n. ectozoon. —adj. of or pertaining to an ectozoon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ectozoan (Thesaurus) ectotrophic ectozoic Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language