hourglass contraction


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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: ectasia
See also: contraction