(n.) A figure bounded by three lines, and containing three
angles.
(n.) An instrument of percussion, usually made of a rod of
steel, bent into the form of a triangle, open at one angle, and sounded
by being struck with a small metallic rod.
(n.) A draughtsman's square in the form of a right-angled
triangle.
(n.) A kind of frame formed of three poles stuck in the ground
and united at the top, to which soldiers were bound when undergoing
corporal punishment, -- now disused.
(n.) A small constellation situated between Aries and
Andromeda.
(n.) A small constellation near the South Pole, containing
three bright stars.
