Machinery. the pin, bar, shaft, or the like, on which or by means of which a wheel or pair of wheels rotates.
the spindle at either end of an axletree.

before 900; Middle English axel, Old English eaxl shoulder, crossbeam (in eaxle-gespann); cognate with Old Frisian ax(e)le, Old Saxon ahsla, Old High German ahsala shoulder (German Achsel), Old Norse ǫxl, Latin āla (< derivative of *akslā)

axled, adjective
unaxled, adjective

axel, axle. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
axle (ˈæksəl)
a bar or shaft on which a wheel, pair of wheels, or other rotating member revolves
[C17: from Old Norse öxull; related to German Achse; see axis1]

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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Word Origin & History

M.E. axel-, from some combination of O.E. eax and O.N. öxull "axis," both from P.Gmc. *akhsulaz, from PIE *aks- "axis" (see axis). Found only in compound axle-tree before 14c.
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

AXLE definition

An early string processing language in which a program consists of an "assertion table" specifying patterns and an "imperative table" specifying replacements.
["AXLE: An Axiomatic Language for String Transformations", K. Cohen et al, CACM 8(11):657-661, Nov 1965].
The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
Wheels on a car rotate around a strong horizontal bar called an axle.
Most drivers are barely aware of their wheels, the metal rims that connect the tires to the axle.
Then an oaken stake is driven into the ground and a wheel is fixed on it as on an axle.
Axle grease also freezes and is warmed with a blowtorch.
Image for axle
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