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trunnion

[truhn-yuh n] /ˈtrʌn yən/
noun
1.
either of the two cylindrical projections on a cannon, one on each side for supporting the cannon on its carriage.
2.
any of various similar supports for machinery.
Origin
1615-1625
1615-25; < French trognon trunk, stump, core (of fruit)
Related forms
trunnioned, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for trunnioned

trunnion

/ˈtrʌnjən/
noun
1.
one of a pair of coaxial projections attached to opposite sides of a container, cannon, etc, to provide a support about which it can turn in a vertical
2.
the structure supporting such a projection
Derived Forms
trunnioned, adjective
Word Origin
C17: from Old French trognon trunk
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for trunnioned

trunnion

n.

"either of two round projections of a cannon," 1620s, from French trognon "core of fruit, stump, tree trunk," from Middle French troignon (14c.), probably, from Latin truncus (see trunk).

Online Etymology Dictionary, © 2010 Douglas Harper
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