plural of trigonometric function

tritubercular

(mathematics) One who does trigonometry.

plural of trigonometrist

(botany) Belonging to the Trigoniaceae.

plural of Pythagorean trigonometric identity

An instrument for solving plane right-angled figures by inspection.

plural of trigonometer

plural of trigonotarbid

Any a group of extinct arachnids (order Trigonotarbida) of the late Silurian and early Permian periods, resembling spiders but without silk-producing spinnerets.