Nearby Words

tractor

[trak-ter] Example Sentences Origin

trac·tor

[trak-ter]
noun
1.
a powerful motor-driven vehicle with large, heavy treads, used for pulling farm machinery, other vehicles, etc.
2.
Also called truck tractor. a short truck with a driver's cab but no body, designed for hauling a trailer or semitrailer.
3.
something used for drawing or pulling.
4.
Aeronautics.
a.
a propeller mounted at the front of an airplane, thus exerting a pull.
b.
Also called tractor airplane. an airplane with a propeller so mounted.

Origin:
1855–60; < Latin trac-, variant stem of trahere to draw, pull + -tor -tor
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Tractor is always a great word to know.
So is shear strain. Does it mean:
ratio between amount by which a body is skewed and its length
vibratory motion in system in which restoring force is proportional to displacement from equilibrium
Example Sentences
  • Lombard, whose invention of the lag-tread tractor brought him world fame, died at his home here today.
  • Still other exiles enthusiastically hie themselves to potato bowls and farm festivals and tractor pulls.
  • It's not so long ago that almost everyone was still a farmer, and with a horse or mule instead of a tractor.
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Collins
World English Dictionary
tractor (ˈtræktə)
 
n
1.  a motor vehicle used to pull heavy loads, esp farm machinery such as a plough or harvester. It usually has two large rear wheels with deeply treaded tyres
2.  a short motor vehicle with a powerful engine and a driver's cab, used to pull a trailer, as in an articulated lorry
3.  an aircraft with its propeller or propellers mounted in front of the engine
 
[C18: from Late Latin: one who pulls, from trahere to drag]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

tractor
1856, "something that pulls," earlier used of a quack device consisting of two metal rods which were supposed to relieve rheumatism (1798, in full Perkins's metallic tractor), from M.L. tractor, from stem of L. trahere "to pull, draw" (see tract (1)). Sense of "an engine or
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vehicle for pulling wagons or plows" is first recorded 1901, from earlier traction engine (1859). The meaning "powerful truck for pulling a freight trailer" is first found 1926; tractor-trailer is attested from 1949.
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Online Etymology Dictionary, © 2010 Douglas Harper
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