Definify.com
Webster 1913 Edition
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1.
(Naut.)
A wooden pin tapering toward both ends with a groove around its middle, fixed transversely in the eye of a rope to be secured to any other loop or bight or ring; a kind of button or frog capable of being readily engaged and disengaged for temporary purposes.
2.
(Mach.)
Two rods or plates connected by a toggle joint.