Spanner
Pronunciation : Span"ner
Part of Speech : n.
Definition : 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.
4. pl.
Defn: A contrivance in some of the ealier steam engines for moving the valves for the alternate admission and shutting off of the steam.
Source : Webster's Unabridged Dictionary, 1913