Bible Dictionaries
Trunnion

Webster's Dictionary

(1):

(n.) A gudgeon on each side of an oscillating steam cylinder, to support it. It is usually tubular, to convey steam.

(2):

(n.) A cylindrical projection on each side of a piece, whether gun, mortar, or howitzer, serving to support it on the cheeks of the carriage. See Illust. of Cannon.

Bibliography Information
Webster, Noah. Entry for 'Trunnion'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​t/trunnion.html. 1828.