/ Dictionary / Index M metacercaria: Meaning and Definition of Find definitions for: met•a•cer•car•i•a Pronunciation: (met"u-sur-kâr'ē-u), [key] — -car•i•ae the encysted larva of a trematode, usually found in or on an aquatic intermediate host. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. metacentric height metachromatism Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language