from The American Heritage® Dictionary of the English Language, 5th Edition.

  • transitive verb Mathematics To be opposite to and delimit.
  • transitive verb To underlie so as to enclose or surround.

from The Century Dictionary.

  • To extend under or be opposite to: a geometrical terra: as, the side of a triangle which subtends the right angle.
  • In botany, to embrace in its axil, as a leaf, bract, etc.: as, in many Compositæ the florets are subtended by bracts called chaff.

from the GNU version of the Collaborative International Dictionary of English.

  • transitive verb To extend under, or be opposed to.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb transitive To extend or stretch underneath or opposite something
  • verb mathematics To enclose an arc on a circle with an angle

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb be opposite to; of angles and sides, in geometry


from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin subtendere, to extend underneath : sub-, sub- + tendere, to extend; see ten- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin subtendere; sub under + tendere to stretch, extend. See tend.


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