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bayonet socket

American

noun

a cylindrical socket having one or more L -shaped slots, the longer side parallel and the shorter side perpendicular to the axis of the socket, along which a knoblike projection on the object slides in such a way that a twist of the object when fully inserted locks it into place.

First recorded in 1890–95

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023