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triquetrous

[trahy-kwee-truh s, -kwe-] /traɪˈkwi trəs, -ˈkwɛ-/
adjective
1.
three-sided; triangular.
2.
having a triangular cross section.
Origin
1650-1660
1650-60; < Latin triquetrus triangular, equivalent to tri- tri- + -quetrus cornered
Related forms
subtriquetrous, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for subtriquetrous

triquetrous

/traɪˈkwiːtrəs; -ˈkwɛt-/
adjective
1.
triangular, esp in cross section: a triquetrous stem
Word Origin
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
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