lever 音标拼音: [l'ɛvɚ] [l'ivɚ]
n . 杠杆,似杠杆之工具
vt . 撬开
vi . 使用杠杆
杠杆,似杠杆之工具撬开使用杠杆
lever 开闭杆
lever 杆
lever n 1 :
a rigid bar pivoted about a fulcrum 2 :
a simple machine that gives a mechanical advantage when given a fulcrum 3 :
a flat metal tumbler in a lever lock [
synonym : {
lever }, {
lever tumbler }]
v 1 :
to move or force ,
especially in an effort to get something open ; "
The burglar jimmied the lock ": "
Raccoons managed to pry the lid off the garbage pail " [
synonym : {
pry }, {
prise },
{
prize }, {
lever }, {
jimmy }]
Lever \
Le "
ver \ (
l [=
e ]"
v [~
e ]
r or l [
e ^]
v "[~
e ]
r ;
277 ),
n . [
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 },
n .]
1 . (
Mech .)
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 .
[
1913 Webster ]
2 . (
Mach .)
(
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 .
[
1913 Webster ]
{
Compound lever },
a machine consisting of two or more levers acting upon each other .
{
Lever escapement }.
See {
Escapement }.
{
Lever jack }.
See {
Jack },
n .,
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 .
[
1913 Webster ]
Lever \
Lev "
er \ (
l [=
e ]"
v [~
e ]
r ),
a . [
Old compar .
of leve or lief .]
More agreeable ;
more pleasing . [
Obs .] --
Chaucer .
[
1913 Webster ]
{
To be lever than }.
See {
Had as lief },
under {
Had }.
[
1913 Webster ]
Lever \
Lev "
er \,
adv .
Rather . [
Obs .] --
Chaucer .
[
1913 Webster ]
For lever had I die than see his deadly face .
--
Spenser .
[
1913 Webster ]
73 Moby Thesaurus words for "
lever ":
Charlie McCarthy ,
agent ,
ancilla ,
appliance ,
bar ,
beam ,
boom ,
cant hook ,
claw bar ,
contrivance ,
crab ,
crane ,
crank ,
creature ,
crow ,
crowbar ,
derrick ,
device ,
dummy ,
dupe ,
erector ,
forklift ,
gantry crane ,
get a foothold ,
get leverage ,
go -
between ,
handmaid ,
handmaiden ,
handspike ,
hoist ,
hydraulic tailgate ,
implement ,
instrument ,
interagent ,
intermediary ,
intermediate ,
intermedium ,
iron crow ,
jack ,
jackscrew ,
jimmy ,
lift ,
lifter ,
limb ,
marlinespike ,
mechanism ,
mediator ,
medium ,
midwife ,
minion ,
organ ,
outrigger ,
pawn ,
peavey ,
pedal ,
pinch bar ,
plaything ,
prize ,
pry ,
puppet ,
ripping bar ,
servant ,
slave ,
spar ,
stooge ,
tackle ,
tool ,
toy ,
treadle ,
vehicle ,
wedge ,
windlass ,
wrecking bar
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