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
WordReference Random House Unabridged Dictionary of American English © 2026
trun•nion
(trun′yən),USA pronunciation n.
trun′nioned, adj.
- either of the two cylindrical projections on a cannon, one on each side for supporting the cannon on its carriage.
- Mechanical Engineeringany of various similar supports for machinery.
- French trognon trunk, stump, core (of fruit)
- 1615–25
Collins Concise English Dictionary © HarperCollins Publishers::
'trunnion' also found in these entries (note: many are not synonyms or translations):