| differential diagnosis | a systematic method of diagnosing a disorder (e.g., headache) that lacks unique symptoms or signs |
| differential blood count | counting the number of specific types of white blood cells found in cubic millimeter of blood, may be included as part of a complete blood count |
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 analyzer | an analog computer designed to solve differential equations |
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 |
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 |
planetary gear
epicyclic gear
planet wheel
planet gear | an outer gear that revolves about a central sun gear of an epicyclic train |
| 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 |
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 |
| 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 |
| differential | a quality that differentiates between similar things |
marginal cost
incremental cost
differential cost | the increase or decrease in costs as a result of one more or one less unit of output |
difference threshold
differential threshold
difference limen
differential limen | the smallest change in stimulation that a person can detect |
differential calculus
method of fluxions | the part of calculus that deals with the variation of a function with respect to changes in the independent variable (or variables) by means of the concepts of derivative and differential |
derived function
derivative
differential coefficient
differential
first derivative | the result of mathematical differentiation, the instantaneous change of one quantity relative to another, df(x)
dx |
| differential psychology | the branch of psychology that studies measurable differences between individuals |
| differential equation | an equation containing differentials of a function |
| partial differential equation | a differential equation involving a functions of more than one variable |
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 |
| in gear | having gears engaged, the car is in gear |
| out of gear(p) | not having gears engaged, threw the machine's pinion out of gear |
| differential | relating to or showing a difference, differential treatment |
| differential | involving or containing one or more derivatives, differential equation |