/ Dictionary / Index C choriocarcinoma: Meaning and Definition of Find definitions for: cho•ri•o•car•ci•no•ma Pronunciation: (kôr"ē-ō-kär"su-nō'mu, kōr"-), [key] — pl. -mas, -ma•ta chorioma. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chorioallantois chorioid Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language