1.One who, or that which, spans.
2.The lock of a fusee or carbine; also, the fusee or carbine itself. (Obs.)
3.An iron instrument having a jaw to fit a nut or the head of a bolt, and used as a lever to turn it with; a wrench; specifically, a wrench for unscrewing or tightening the couplings of hose. (Chiefly British usage)
4.pl. A contrivance in some of the earlier steam engines for moving the valves for the alternate admission and shutting off of the steam.
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