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triangle

UK/ˈtɹaɪəŋɡəl/ US/ˈtɹaɪˌæŋɡəl/ fairly common us

noun

1.
2.

something approximating the shape of a triangle

  • “the coastline of Chile and Argentina and Brazil forms two legs of a triangle”
3.

any of various triangular drafting instruments used to draw straight lines at specified angles

4.

a percussion instrument consisting of a metal bar bent in the shape of an open triangle

Origin

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.

Phrases

  • acute triangle
  • acute-angled triangle
  • anal triangle
  • anterior triangle
  • Bermuda Triangle
  • Bir Tawil Triangle
  • black triangle
  • blue triangle

Related words

Word family

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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.