\Tres"tle\, n. [OF. trestel, tresteay, F. tr['e]teau;
probably from L. transtillum a little crossbeam, dim. of
transtrum a crossbeam. Cf. {Transom}.] [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.