trigonous

[ trig-uh-nuh s ]
/ ˈtrɪg ə nəs /

adjective

having three angles or corners, as a stem or seed; triangular.

Origin of trigonous

1750–60; < Latin trigōnus triangular < Greek trígōnos. See tri-, -gon, -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for trigonous

trigonous

/ (ˈtrɪɡənəs) /

adjective

(of stems, seeds, and similar parts) having a triangular cross section

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