trunnioned

trunnion

[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; < French trognon trunk, stump, core (of fruit)

trunnioned, adjective
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World English Dictionary
trunnion (ˈtrʌnjən)
 
n
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
 
[C17: from Old French trognon trunk]
 
'trunnioned
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
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, © 2010 Douglas Harper
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