/ Dictionary / Index R Reptilia: Meaning and Definition of Find definitions for: Rep•til•i•a Pronunciation: (rep-til'ē-u), [key] — n. the class comprising the reptiles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reptilia (Thesaurus) reptile reptilian Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language