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Word of the Day
Friday, April 18, 2014

Definitions for dyad

  1. a group of two; couple; pair.
  2. Biology. a. a secondary morphological unit, consisting of two monads: a chromosome dyad. b. the double chromosomes resulting from the separation of the four chromatids of a tetrad.
  3. Chemistry. an element, atom, or group having a valence of two. Compare monad, triad (def. 2a).

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Citations for dyad
The novel burrows into the separate and often separated perspectives of this strange dyad, Dial and Che. James Wood, "Notes from Underground," The New Yorker, March 3, 2008
...she stayed close by imitating his distance from her with an equal and identical distance from him and, extending out into the world beyond the father-daughter dyad, from all of humanity. Matthew Sharpe, The Sleeping Father, 2003
Origin of dyad
1665-1675
Dyad is derived from the Greek word dyad- which meant "pair, equivalent."