subtend Meaning, Definition & Usage

  1. verb be opposite to; of angles and sides, in geometry
    delimit.

WordNet

Sub*tend" transitive verb
Etymology
L. subtendere; sub under + tendere to stretch, extend. See Tend.
Wordforms
imperfect & past participle Subtended; present participle & verbal noun Subtending
Definitions
  1. To extend under, or be opposed to; as, the line of a triangle which subtends the right angle; the chord subtends an arc.

Webster 1913