trigonal

Example Sentences

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Trigonal Bipyramidal Class Here there is a plane of symmetry perpendicular to the triad axis.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 "Crocoite" to "Cuba" by Various

Trigonal: triangular: an area bounded by a triangle.

From Explanation of Terms Used in Entomology by Smith, John. B.