triangle

Definition

A polygon with three sides and three angles.

Etymology

PIE word *tréyes From Middle English triangle, from Old French triangle, from Latin triangulum, noun use of adjective triangulus (“three-cornered, having three angles”), from trēs (“three”) + angulus (“corner, angle”), equivalent to tri- + -angle.

Example Sentences

• "The wedge-shaped character was the triangle, the archaic Paleolithic sign of the vulva; the pubic triangle was at the end of the phallic stylus."
• "One of the writers' most pleasing inventions was to treat the triangle love story as comedy."
• "I was flogged in 1840. To this day I feel a pain in the chest from the triangles."