hourglass contraction


hour·glass con·trac·tion

constriction of the middle portion of a hollow organ, such as the stomach or the gravid uterus.

hour·glass con·trac·tion

(owr'glas kŏn-trak'shŭn) Constriction of the middle portion of a hollow organ, such as the stomach or the gravid uterus.

hourglass contraction

An excessive, irregular contraction of an organ at its center. See: ectasiaSee also: contraction