Meaning of subtend

sub•tend

Pronunciation: (sub-tend', sub-), [key]
— v.t.
  1. to extend under or be opposite to: a chord subtending an arc.
  2. (of a leaf, bract, etc.) to occur beneath or close to.
  3. to form or mark the outline or boundary of.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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