*wrench*

n. A wrench or spanner which has one fixed and one adjustable jaw.
Syn. -- monkey wrench. [ WordNet 1.5 ]

A pipe wrench having an adjustable L-shaped jaw piece sliding in a sleeve that is pivoted to, and loosely embraces, the handle. Pressure on the handle increases the grip. [ Webster 1913 Suppl. ]

n. [ OE. wrench deceit, AS. wrenc deceit, a twisting; akin to G. rank intrigue, crookedness, renken to bend, twist, and E. wring. √144. See Wring, and cf. Ranch, v. t. ] [ 1913 Webster ]

1. Trick; deceit; fraud; stratagem. [ Obs. ] [ 1913 Webster ]

His wily wrenches thou ne mayst not flee. Chaucer. [ 1913 Webster ]

2. A violent twist, or a pull with twisting. [ 1913 Webster ]

He wringeth them such a wrench. Skelton. [ 1913 Webster ]

The injurious effect upon biographic literature of all such wrenches to the truth, is diffused everywhere. De Quincey. [ 1913 Webster ]

3. A sprain; an injury by twisting, as in a joint. [ 1913 Webster ]

4. Means; contrivance. [ Obs. ] Bacon. [ 1913 Webster ]

5. An instrument, often a simple bar or lever with jaws or an angular orifice either at the end or between the ends, for exerting a twisting strain, as in turning bolts, nuts, screw taps, etc.; a screw key. Many wrenches have adjustable jaws for grasping nuts, etc., of different sizes. [ 1913 Webster ]

6. (Mech.) The system made up of a force and a couple of forces in a plane perpendicular to that force. Any number of forces acting at any points upon a rigid body may be compounded so as to be equivalent to a wrench. [ 1913 Webster ]

Carriage wrench, a wrench adapted for removing or tightening the nuts that confine the wheels on the axles, or for turning the other nuts or bolts of a carriage or wagon. --
Monkey wrench. See under Monkey. --
Wrench hammer, a wrench with the end shaped so as to admit of being used as a hammer. [ 1913 Webster ]