The Meaning of trunnion

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

linnean

These are word lists that we think you may find interesting.