From The Collaborative International Dictionary of English v.0.44 [gcide]:
Subtend \Sub*tend"\, verb (used with an object) [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) 2.0 [wn]:
verb
1: be opposite to; of angles and sides, in geometry [syn: {delimit}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
19 Moby Thesaurus words for "subtend": bump heads, confront, contend, contrapose, contraposit, contrast, counteract, face, front, lie opposite, match, meet head-on, oppose, polarize, pose against, put in opposition, set over against, stand opposed, stand opposite
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Let's see what we can do if we put our heads together.
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