trigonal

adjective

tri·​go·​nal trī-ˈgō-nᵊl How to pronounce trigonal (audio)
: of, relating to, or being the division of the hexagonal crystal system or the forms belonging to it characterized by a vertical axis of threefold symmetry
trigonally adverb

Word History

First Known Use

1878, in the meaning defined above

Time Traveler
The first known use of trigonal was in 1878

Dictionary Entries Near trigonal

Cite this Entry

“Trigonal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trigonal. Accessed 1 Dec. 2022.

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