Dictionary![]() ![]() cho•ri•o•maPronunciation: (kôr"ē-ō'mu, kōr"-), [key] —n., —pl. -mas, -ma•taPronunciation: (-mu-tu). [key] Pathol. any benign or malignant tumor of chorionic tissue; choriocarcinoma. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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