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OTHER WORDS FROM trigonaltrig·o·nal·ly, adverbsub·trig·o·nal, adjective
Words nearby trigonal
Example sentences from the Web for trigonal
Orifice either large and rounded-trigonal, or small and oval, either entire or less frequently toothed.
Parietes ribbed, mottled purplish-red; orifice broad, trigonal, hardly toothed.
The horns are trigonal, laterally compressed and knotted on the upper edge.Natural History of the Mammalia of India and Ceylon|Robert A. Sterndale
When the whorls are angulated, a trigonal aperture is the result, as in many species of Trochus.
Mactracea (plates, fig. 77 to 88), the cartilage placed in a trigonal pit, with a small external ligament.