Tres·tle n.  [Written also tressel.]
 1. A movable frame or support for anything, as scaffolding, consisting of three or four legs secured to a top piece, and forming a sort of stool or horse, used by carpenters, masons, and other workmen; also, a kind of framework of strong posts or piles, and crossbeams, for supporting a bridge, the track of a railway, or the like.
 2. The frame of a table.
 Trestle board, a board used by architects, draughtsmen, and the like, for drawing designs upon; -- so called because commonly supported by trestles.
 Trestle bridge. See under Bridge, n.

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