Tri′an-gle.
1. (Music.) An equilateral bar of steel suspended by one angle and having an opening at one of the lower angles, so that the legs are of unequal length. It is struck with a small rod, and is sometimes introduced in brilliant musical passages.
Trial-square. |
Triangles. |
2. (Drafting.) A threecor-nered straight-edge, used in conjunction with the T-square for drawing parallel, perpendicular, or diagonal lines. It has one right angle, the two others being each of 45° (b), or one of 30° and the other of 60° (a).
3. (Building, etc.) A gin formed by three spars. A staging of three spars.
4. (Pottery.) A small piece of pottery, placed between pieces of biscuit ware in the seggar, to prevent the adherence of the pieces when fired. 5. A frame of three halberds to which a person is (was) lashed to undergo military punishment.