HYDATIDIFORM MOLE Meaning of HYDATIDIFORM MOLE in English [ ˌhʌɪdə'tɪdɪfɔ:m ]■ noun Medicine a cluster of fluid-filled sacs formed in the womb by the degeneration of chorionic tissue around an aborting embryo. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004