By means of, or in terms of, trigonometry.

plural of trigonometry

plural of trigonid

The shearing end of a tribosphenic molar.

(biochemistry) An alkaloid product of the metabolism of niacin, found in many plants including fenugreek (Trigonella foenum-graecum).

(anatomy) Synonym of os trigonum (“an accessory bone of the foot”)

plural of logarithmic trigonometric function

(mineralogy) A monoclinic-domatic mineral containing arsenic, hydrogen, lead, manganese, and oxygen.

(zoology) Any clam in the family Trigoniidae.

(zoology) Any wasp in the family Trigonalidae.