/ Dictionary / Index T teratoid: Meaning and Definition of Find definitions for: ter•a•toid Pronunciation: (ter'u-toid"), [key] — adj. Biol. resembling a monster. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. teratogenesis teratology Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language