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trunnion

 - 3 dictionary results

trun⋅nion

[truhn-yuhn]
–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:
1615–25; < F trognon trunk, stump, core (of fruit)


trunnioned, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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trun·nion   (trŭn'yən)   
n.  A pin or gudgeon, especially either of two small cylindrical projections on a cannon forming an axis on which it pivots.

[French trognon, stump.]
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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Word Origin & History

trunnion 
1625, "either of two round projections of a cannon," from Fr. trognon "core of fruit, stump, tree trunk," from M.Fr. troignon (14c.), probably, from L. truncus (see trunk).
Online Etymology Dictionary, © 2001 Douglas Harper
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