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differential gear

 - 6 dictionary results

differential gear

–noun Machinery.
1. differential (def. 7).
2. any of various comparable arrangements of gears, as an epicyclic train.

Origin:
1885–90

dif⋅fer⋅en⋅tial

[dif-uh-ren-shuhl]
–adjective
1. of or pertaining to difference or diversity.
2. constituting a difference; distinguishing; distinctive: a differential feature.
3. exhibiting or depending upon a difference or distinction.
4. Physics, Machinery. pertaining to or involving the difference of two or more motions, forces, etc.
5. Mathematics. pertaining to or involving a derivative or derivatives.
–noun
6. a difference or the amount of difference, as in rate, cost, quantity, degree, or quality, between things that are comparable.
7. Also called differential gear. Machinery. an epicyclic train of gears designed to permit two or more shafts to rotate at different speeds, as a set of gears in an automobile permitting the rear wheels to be driven at different speeds when the car is turning.
8. Mathematics.
a. a function of two variables that is obtained from a given function, y = f(x), and that expresses the approximate increment in the given function as the derivative of the function times the increment in the independent variable, written as dy = f′(x)dx.
b. any generalization of this function to higher dimensions.
9. Commerce.
a. the difference involved in a differential rate.
b. differential rate.
10. Physics. the quantitative difference between two or more forces, motions, etc.: a pressure differential.

Origin:
1640–50; < ML differentiālis, equiv. to differenti(a) difference + ālis -al


dif⋅fer⋅en⋅tial⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To differential gear
differential gear  
n.  An arrangement of gears in an epicyclic train permitting the rotation of two shafts at different speeds, used on the rear axle of automotive vehicles to allow different rates of wheel rotation on curves.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Financial Dictionary

differential

  1. In commodities trading, the premium or discount in the futures contract price caused by delivering a commodity that does not exactly meet the standards fixed by the exchange. Allowances for these differentials are included in the contract specifications.

  2. See odd-lot differential.


Wall Street Words: An A to Z Guide to Investment Terms by David L. Scott.
Copyright © 2003. Published by Houghton Mifflin.
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Medical Dictionary

Main Entry: dif·fer·en·tial
Pronunciation: "dif-&-'ren-ch&l
Function: adjective
1 : of, relating to, or constituting adifference <differential birth rates in different economic levels>
2 : making a distinction between individuals or classes <differential cell counts><differential staining> —dif·fer·en·tial·ly /-'rench-(&-)lE/ adverb
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Science Dictionary
differential   (dĭf'ə-rěn'shəl)  Pronunciation Key 
  1. An infinitesimal increment in a variable.

  2. The product of the derivative of a function of one variable and the increment of the independent variable.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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