Toggle \Tog"gle\, n. [Cf. Tug.]

[Written also toggel.]

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.

Source: Webster's Revised Unabridged Dictionary (1913)