Hypertext Webster Gateway: "Subtend"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Subtend \Sub*tend"\, v. t. [imp. & p. p. {Subtended}; p. pr. &
vb. n. {Subtending}.] [L. subtendere; sub under + tendere to
stretch, extend. See {Tend}.]
To extend under, or be opposed to; as, the line of a triangle
which subtends the right angle; the chord subtends an arc.
From WordNet (r) 1.7 (wn)
subtend
v : be opposite to; of angles and sides, in geometry [syn: {delimit}]
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