bevel gear
pinion and crown wheel
pinion and ring gear | gears that mesh at an angle |
| chafing gear | covering (usually rope or canvas) of a line or spar to protect it from friction |
differential gear
differential | a bevel gear that permits rotation of two shafts at different speeds, used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves |
epicyclic train
epicyclic gear train | a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis |
first gear
first
low gear
low | the lowest forward gear ratio in the gear box of a motor vehicle, used to start a car moving |
fishing gear
tackle fishing tackle
fishing rig
rig | gear used in fishing |
| foul-weather gear | protective garment that is intended to keep the wearer dry and warm in bad weather |
gear
gear wheel
geared wheel
cogwheel | a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion |
gear paraphernalia
appurtenance | equipment consisting of miscellaneous articles needed for a particular operation or sport etc. |
| gear gear mechanism | a mechanism for transmitting motion for some specific purpose (as the steering gear of a vehicle) |
gearbox
gear box
gear case | the shell (metal casing) in which a train of gears is sealed |
gearing
gear geartrain
power train
train | wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed, the fool got his tie caught in the geartrain |
gearshift
gearstick
shifter
gear lever | a mechanical device for engaging and disengaging gears, in Britain they call a gearshift a gear lever |
Global Positioning System
GPS | a navigational system involving satellites and computers that can determine the latitude and longitude of a receiver on Earth by computing the time difference for signals from different satellites to reach the receiver |
high gear
high | a forward gear with a gear ratio that gives the greatest vehicle velocity for a given engine speed |
| landing gear | an undercarriage that supports the weight of the plane when it is on the ground |
pincer
pair of pincers
tweezer
pair of tweezers | a hand tool for holding consisting of a compound lever for grasping |
planetary gear
epicyclic gear
planet wheel
planet gear | an outer gear that revolves about a central sun gear of an epicyclic train |
pliers
pair of pliers
plyers | a gripping hand tool with two hinged arms and (usually) serrated jaws |
| reduction gear | gearing that reduces an input speed to a slower output speed |
reverse
reverse gear | the gears by which the motion of a machine can be reversed |
scissors
pair of scissors | an edge tool having two crossed pivoting blades |
second gear
second | the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle, he had to shift down into second to make the hill |
spur gear
spur wheel | gear wheels that mesh in the same plane |
stable gear
saddlery
tack | gear for a horse |
| steering gear | a gear that couples the steering wheel to the steering linkage of a motor vehicle |
| sun gear | the central gear in an epicyclic train |
third gear
third | the third from the lowest forward ratio gear in the gear box of a motor vehicle, you shouldn't try to start in third gear |
tongs
pair of tongs | any of various devices for taking hold of objects, usually have two hinged legs with handles above and pointed hooks below |
virginal
pair of virginals | a legless rectangular harpsichord, played (usually by women) in the th and th centuries |
| worm gear | gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel), changes the direction of the axis of rotary motion |
| transient global amnesia | memory disorder seen in middle aged and elderly persons, characterized by an episode of amnesia and bewilderment that lasts for several hours, person is otherwise alert and intellectually active |
| pair | a poker hand with cards of the same value |
| pair | two people considered as a unit |
| pair brace | a set of two similar things considered as a unit |
world organization
world organisation
international organization
international organisation
global organization | an international alliance involving many different countries |
| au pair | a young foreigner who lives with a family in return for doing light housework |
| au pair girl | a foreign girl serving as an au pair |
climate change
global climate change | a change in the world's climate |
| global warming | an increase in the average temperature of the earth's atmosphere (especially a sustained increase that causes climatic changes) |
pair production
pair creation
pair formation | the transformation of a gammaay photon into an electron and a positron when the photon passes close to an atomic nucleus |
d couple
pair
twosome
twain
brace
span yoke
couplet
distich
duo
duet
dyad
duad | two items of the same kind |
global aphasia
total aphasia | loss of all ability to communicate |
| base pair | one of the pairs of chemical bases joined by hydrogen bonds that connect the complementary strands of a DNA molecule or of an RNA molecule that has two strands, the base pairs are adenine with thymine and guanine with cytosine in DNA and adenine with uracil and guanine with cytosine in RNA |
gear
pitch | set the level or character of, She pitched her speech to the teenagers in the audience |
fix prepare
set up ready
gear up
set | make ready or suitable or equip in advance for a particular purpose or for some use, event, etc, Get the children ready for school!, prepare for war, I was fixing to leave town after I paid the hotel bill |
| match mate couple pair twin | bring two objects, ideas, or people together, This fact is coupled to the other one, Matchmaker, can you match my daughter with a nice young man?, The student was paired with a partner for collaboration on the project |
copulate
mate
pair
couple | engage in sexual intercourse, Birds mate in the Spring |
| pair geminate | arrange in pairs, Pair these numbers |
| pair geminate | occur in pairs |