hourglass contraction
[ our′glăs′ ]
n.
Constriction of the middle portion of a hollow organ, such as the stomach or the uterus.
Words nearby hourglass contraction
hour,
hour angle,
hour circle,
hour hand,
hourglass,
hourglass contraction,
hourglass murmur,
hourglass stomach,
houri,
hourlong,
hourly