triquetrous

[ trahy-kwee-truh s, -kwe- ]
/ traɪˈkwi trəs, -ˈkwɛ- /
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adjective

three-sided; triangular.
having a triangular cross section.

Origin of triquetrous

1650–60; < Latin triquetrus triangular, equivalent to tri- tri- + -quetrus cornered
Related formssub·tri·que·trous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for triquetrous

triquetrous

/ (traɪˈkwiːtrəs, -ˈkwɛt-) /

adjective

triangular, esp in cross sectiona triquetrous stem

Word Origin for triquetrous

C17: from Latin triquetrus having three corners
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012