See Also: Trigonometry(medicine)
trigonometry(dictionary)
trigonometry(encyclopedia)
trigonometry(dictionary)

trigonometry (iou)



trigonometry noun. E17.
[mod. Latin trigonometria, formed as TRIGONOMETRICAL + -METRY.]
The branch of mathematics that deals with the relations between the sides and angles of triangles, esp. as expressed by the trigonometric functions, and including the theory of triangles, of angles, and of (elementary) singly periodic functions.
plane trigonometry: which deals with plane triangles and angles. spherical trigonometry: which deals with spherical triangles and angles.
trigonometer noun (a) any of various trigonometrical instruments; (b) an expert in trigonometry; spec. one engaged in trigonometrical survey: M18.