Definitions

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

  • noun A unit of two objects; a pair.

from The Century Dictionary.

  • noun Same as dyad.
  • noun In mathematics, an unordered, pair; two objects considered as making up one, and as the same one whichever is taken first.

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

  • noun rare A union of two; duality.

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

  • noun A pair or couple
  • noun mathematics an unordered pair
  • noun astrology dwadasama

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

  • noun two items of the same kind

Etymologies

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

[Greek duas, duad-, two, from duo; see dwo- in Indo-European roots.]

Examples

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