Dictionary Definition

dyad n : two items of the same kind [syn: couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, duad]

User Contributed Dictionary

A set of two different elements.
- 1924: ARISTOTLE. Metaphysics. Translated by W. D. Ross. Nashotah, Wisconsin, USA: The Classical Library, 2001. Available at: . Book 1, Part 6.
  
  positioning a dyad and constructing the infinite out of great and small, instead of treating the infinite as one, is pucliar to him;
any set of two different pitch classes.

a set of two different elements

music: any set of two different pitch classes

Etymology: Late Latin dyad-, dyas, from Greek δυας, from dyo

dyad may refer to:

dyad (symbol), according to the Pythagoreans, is the principle of "twoness" or "otherness"
dyad (biology), a pair of sister chromatids occurring in prophase I of meiosis
dyad (General), consisting of two parts
dyad (Greek philosophy), Greek philosopher's principle of "twoness" or "otherness"
dyad (music), a set of two notes or pitches
dyad (sociology), mostly refers to parents and friends, occasionally to twins
dyad, in engineering kinematics, a linkage in a planar mechanism that has two possible assembly modes
dyad, in Obstetrics refers to the pregnant mother and fetus
dyad (spiritual workshops), is a partner-assisted meditation with rules to prevent trip-laying and abuse
dyadic tensor, in mathematics