crutch(redirected from repulsion crutch)
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1. Brit another word for crotch
a. a forked support for a boom or oar, etc.
b. a brace for reinforcing the frames at the stern of a wooden vessel
One of a pair of naturally curved timbers that rise from the outer walls to support the ridge beam, each crutch being called a blade, 4; joined at the top and connected by one or two tie beams, the resulting arched frame forming the unit in the framework of old English houses or farm buildings; pairs of crutches were placed at approximately equal intervals.