trigonal

adjective
tri·​go·​nal | \ trī-ˈgō-nᵊl How to pronounce trigonal (audio) \

Definition of trigonal

: 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

Other Words from trigonal

trigonally \ trī-​ˈgō-​nᵊl-​ē How to pronounce trigonally (audio) \ adverb

First Known Use of trigonal

1878, in the meaning defined above

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The first known use of trigonal was in 1878

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