Trun"cheon (?), n. [OE. tronchoun the shaft of a broken spear, broken
piece, OF. tronchon, tron&?;on, F. tron&?;on, fr. OF. & F. tronce,
tronche, a piece of wood; cf. OF. trons, tros, trois; all perhaps from
L. thyrsus a stalk, stem, staff. See Thyrsus, and cf. Trounce.] 1. A
short staff, a club; a cudgel; a shaft of a spear.
With his truncheon he so rudely struck.
Spenser.