The Collaborative International Dictionary
Subtense
Subtense \Sub*tense"\, n. [L. subtendere, subtentum. See Subtend, Tense, a.] (Geom.) A line subtending, or stretching across; a chord; as, the subtense of an arc.
Wiktionary
subtense
n. 1 (context geometry English) A line which subtend, ''especially'' the chord of an arc. 2 (context geometry English) The angle subtended by a line at a point.