from The Century Dictionary.

  • noun In geom., a line subtending or stretching across; the chord of an are; a line opposite to an angle spoken of.

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

  • noun (Geom.) A line subtending, or stretching across; a chord.

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

  • noun geometry A line which subtends, especially the chord of an arc.
  • noun geometry The angle subtended by a line at a point.


Sorry, no etymologies found.


  • A rough calculation based on an angular subtense of 1/2 degree and a distance of 30,000 feet suggests that the shadow would be wholly washed out.

    The Glory - The Panda's Thumb


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  • I assume the "are" in the Century definition should be "arc."

    October 16, 2015

  • Would that be unpretentious? (to no accord?)

    October 17, 2015