triangle
/ˈtraɪæŋgl/noun
1
- a plane figure with three straight sides and three angles三角形：
an equilateral triangle.
等边三角形。
1.1
- a thing shaped like such a figure三角形物：
a small triangle of grass.
一小块三角形草地。
1.2
- a situation involving three people or things, especially an emotional relationship involving a couple and a third person with whom one of them is involved（尤指情感上的）三角关系。
1.3
- a musical instrument consisting of a steel rod bent into a triangle and sounded by being struck with a small steel rod三角铁（打击乐器）。
1.4
- a frame used to position the pool balls in snooker and pool（摆放斯诺克和落袋台球撞球位置的）三角框。
1.5
- N. Amer. a drawing instrument in the form of a right-angled triangle〈北美〉直角三角形三角板（绘图用具）。
1.6
triangles
historical a frame of three halberds joined at the top to which a soldier was bound for flogging〈史〉（系缚士兵以鞭打的）三戟刑具。
2
- a small brownish Eurasian moth of oak and beech woods小型欧亚紫刺蛾（呈棕色, 见于橡木及山毛榉林）。
2.1
- Heterogenea asella, family Limacodidae.拉丁名Heterogenea asella, 刺蛾科。
词源
late Middle English: from Old French triangle or Latin triangulum, neuter of triangulus 'three-cornered' （see TRI-, ANGLE1）.