spanner

n.	1.	One who, or that which, spans.
	2.	The lock of a fusee or carbine; also, the fusee or carbine itself.
	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.	A contrivance in some of the earlier steam engines for moving the valves for the alternate admission and shutting off of the steam.

Noun

1.

spanner - a hand tool that is used to hold or twist a nut or bolt Synonyms: wrench

adjustable spanner, adjustable wrench, Allen wrench, alligator wrench, box end wrench, box wrench, brace wrench, bulldog wrench, carriage wrench, dog wrench, hand tool, hook spanner, hook wrench, jaw, jaws, lug wrench, open-end wrench, pin wrench, screw key, socket wrench, sparkplug wrench, tap wrench, tappet wrench, torque wrench, wrench