from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A pin or gudgeon, especially either of two small cylindrical projections on a cannon forming an axis on which it pivots.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One of the short stubby bearings on either side of a cannon; a gudgeon.
- n. A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool.
from the GNU version of the Collaborative International Dictionary of English
- 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.
from The Century Dictionary and Cyclopedia
- n. One of the cylindrical projections on the sides of a cannon, cast or forged in one piece with the cannon itself, which support it on its carriage.
- n. In steam-engines, a hollow gudgeon on each side of an oscillating cylinder, which supports the cylinder, and through which steam is received and exhausted.
French trognon, stump.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French trognon ("core, stump"). (Wiktionary)