lever
Noun · VerbOpen English WordNet
Noun (3)levers
- a rigid bar pivoted about a fulcrumType of barKinds stick, gun trigger, tire iron, pedal, crowbar, key, peavey, tiller, pinch bar, spark lever +5 moreParts fulcrum
- a simple machine that gives a mechanical advantage when given a fulcrumType of machine, simple machine
- a flat metal tumbler in a lever lockSynonyms: lever tumblerType of tumblerPart of lever lock
What does it mean? Question 1 of today’s quiz
Webster's Dictionary (1913)
Origin: Old compar. of leve or lief.
More agreeable; more pleasing. obsolete Geoffrey Chaucer
To be lever than. See Had as lief, under Had.
Rather. obsolete Geoffrey Chaucer
For lever had I die than see his deadly face.— Edmund Spenser
Origin: OE. levour, OF. leveor, prop., a lifter, fr. F. lever to raise, L. levare; akin to levis light in weight, E. levity, and perh. to E. light not heavy: cf. F. levier. Cf. Alleviate, Elevate, Leaven, Legerdemain, Levee, Levy, noun
1. Mechanics A rigid piece which is capable of turning about one point, or axis (the fulcrum), and in which are two or more other points where forces are applied; — used for transmitting and modifying force and motion. Specif., a bar of metal, wood, or other rigid substance, used to exert a pressure, or sustain a weight, at one point of its length, by receiving a force or power at a second, and turning at a third on a fixed point called a fulcrum. It is usually named as the first of the six mechanical powers, and is of three kinds, according as either the fulcrum F, the weight W, or the power P, respectively, is situated between the other two, as in the figures.
2. Machinery (a) A bar, as a capstan bar, applied to a rotatory piece to turn it. (b) An arm on a rock shaft, to give motion to the shaft or to obtain motion from it.
Compound lever, a machine consisting of two or more levers acting upon each other. — Lever escapement. See Escapement. — Lever jack. See Jack, noun, 5. — Lever watch, a watch having a vibrating lever to connect the action of the escape wheel with that of the balance. — Universal lever, a machine formed by a combination of a lever with the wheel and axle, in such a manner as to convert the reciprocating motion of the lever into a continued rectilinear motion of some body to which the power is applied.
Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54