Definify.com
Webster 1913 Edition
Trunnion
Trun′nion
,Noun.
[OF.
trognon
the stock, stump, or truck of a tree, F. trognon
a core, stalk, fr. tron
a trunk, stem. Cf. Trunk
.] 1.
(Gun.)
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
. 2.
(Steam Engine)
A gudgeon on each side of an oscillating steam cylinder, to support it. It is usually tubular, to convey steam.
Trunnion plate
(Gun.)
, a plate in the carriage of a gun, mortar, or howitzer, which covers the upper part of the cheek, and forms a bearing under the trunnion.
– Trunnion ring
(Gun.)
, a ring on a cannon next before the trunnions.
[R.]
Webster 1828 Edition
Trunnion
TRUN'NION
,Noun.