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lev·er

(lev'ĕr, lēv'),
An instrument used to lift or pry.
[Fr. lever, to lift]

lever

[lē′vər, lev′ər]
Etymology: L, levare, to lift up
any one of the numerous bones and associated joints of the body that act as a simple machine so that force applied to one end of the bone tends to rotate the bone in the direction opposite from that of the applied force. The muscles of the body produce the forces that move the levers. The basic components of a lever are the fulcrum, the force arm, and the weight arm. A first-class lever, such as the joint between the base of the skull and the first cervical vertebra, has a fulcrum between the weight and the applied force. The body contains few second-class levers, which have the weight between the fulcrum and the force. A third-class lever, such as the forearm and elbow, has the force between the fulcrum and the weight. The body uses its third-class levers for speed and its first-class levers for either force or speed, depending on the force applied to the weight arm.

lev·er

(lev'ĕr)
An instrument used to lift or pry.
[Fr. lever, to lift]

lever (lev´ur),

n a bar or rigid body that is capable of turning about one joint or axis and in which are two or more other points where forces are applied. There are three classes of levers, and each has its own most effective use.
lever leverage
n the mechanical advantage gained by the use of a lever. A factor in the magnification of stresses generated by an extension-base partial denture.
lever, second-class,
n a lever in which the force arm is longer than the work-producing arm; thus the work produced is always greater than the energy used, with a resultant high efficiency.
lever, third-class,
n a lever in which the axis is at one end, the load at the other end, and the effort is exerted in between, as in a treadle.
References in classic literature ?
Nothing," said Lever, with a deepening accent, "only you did not.
New contemporary door levers from Kwikset allow homeowners to give their homes a more modern feel for less than $50.
Five Levers to Improve Learning: How to Prioritize for Powerful Results in Your School
1978; Pliskoff and Fetterman 1981; Stubbs and Pliskoff 1969); (b) a barrier was placed between two keys, forcing pigeons to jump over it when alternating keys (Baum 1982); and (c) rats climbed barriers of different heights, travelling back and forth between two levers that provided food according to concurrent random interval schedules (Aparicio 2001).
Alan Levers, 50, was three and a half times over the alcohol limit for driving when he threatened a cashier with a fake hand gun at the Crownhill Road branch of Ladbrokes on January 25 this year.
Tenders are invited for Supply of set of 13t bmbc levers for bogie consisting of 05(five) items are as (1)lever hanger( 20 x 100 x 382) mm to rdso sk.
These efforts have led to alternative wheelchair designs, including those that utilize push levers for propulsion rather than hand rims.
Alan Levers, 50, was believed to be wearing a gas mask and carrying an imitation gun when he stormed into the Ladbrokes branch on Crownhill Road in Plymouth, Devon, shortly before 7pm on Friday night.
During the vehicle manufacturing process, workers noticed that some of the levers in their parts bins were silver or aluminum gray rather than the normal gold or bronze color.
The E-2/C-2 power-lever lock is a simple, mechanical "Rube-Goldberg" type device that is used only on carrier landings to prevent the power levers ("throttles") from coming out of the flight range after touchdown.
Levers handle like quick silver, racing from empty chamber to battery with a flick of the wrist.
Workers from the Oklahoma City Air Logistics Center's 76th Maintenance Wing combined with Air Force Materiel Command's other two depots in a round-the-clock push to make hundreds of levers, helping Air Force officials keep the T-38 training jet flying.