
thumb|right|320px|The trunnions are the protrusions from the side of the barrel that rest on the carriage.
thumb|right|320px|The trunnions are the protrusions from the side of the barrel that rest on the carriage.
A trunnion () is a cylindrical protrusion used as a mounting or pivoting point. First associated with cannons, they are an important military development.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).