Definition of trunnion in English:

trunnion

Line breaks: trun|nion
Pronunciation: /ˈtrʌnjən
 
/

noun

1A pin or pivot forming one of a pair on which something is supported.
More example sentences
  • The introduction of trunnions, the pivots in the middle of the barrel permitting it to move independently of the carriage, was a simple but important development.
  • The main frame of this machine is fitted at its base with trunnions, which work in a foundation plate.
  • Although the compass carries no maker's marks, it is designed to fit across the transit's trunnions and has a pin that fits a hole on the transit.
1.1A supporting cylindrical projection on each side of a cannon or mortar.
More example sentences
  • The gun is fitted with a trunnion mounted telescopic sight for direct firing up to 3,000m.
  • As with the machine-gun platform, the turntable and trunnions are intact, but the gun itself is missing.
  • The barrel and breech have been salvaged, so all that remains at the top are a pair of trunnions.

Origin

early 17th century: from French trognon 'core, tree trunk', of unknown origin.

Definition of trunnion in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day apposite
Pronunciation: ˈapəzit
adjective
apt in the circumstances or relation to something