hydatid mole(n = noun.state) hydatidiform mole, molar pregnancy - 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;
is a kind of abnormalcy, abnormality

american shrew mole, asiatic shrew mole, brewer's mole, damaraland mole rat, golden mole, hair-tailed mole, hydatid, hydatid disease, hydatidiform mole, marsupial mole, mole, mole cricket, mole plant, mole rat, mole salamander, naked mole rat, pouched mole, queen mole rat, shrew mole, star-nosed mole, starnose mole, water mole