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Definition of Molar pregnancy
1. Noun. An abnormality during pregnancy; chorionic villi around the fetus degenerate and form clusters of fluid-filled sacs; usually associated with the death of the fetus.
Medical Definition of Molar pregnancy
1. Pregnancy marked by a neoplasm within the uterus, whereby part or all of the chorionic villi are converted into a mass of clear vesicles. (05 Mar 2000)