Latin trigonum, from Greek trigōnon, from neuter of trigōnos triangular, from tri- + gōnia angle — more at -gon
1563, in the meaning defined above
trigness
trigon
trigonal
“Trigon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trigon. Accessed 11 Sep. 2024.
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