dyad
[ dahy-ad ]
/ ˈdaɪ æd /
noun
a group of two; couple; pair.
Biology.
- a secondary morphological unit, consisting of two monads: a chromosome dyad.
- the double chromosomes resulting from the separation of the four chromatids of a tetrad.
Mathematics. two vectors with no symbol connecting them, usually considered as an operator.
Sociology.
- two persons involved in an ongoing relationship or interaction.
- the relationship or interaction itself.
adjective
of two parts; dyadic.
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Examples from the Web for dyad
British Dictionary definitions for dyad
dyad
/ (ˈdaɪæd) /
noun
maths an operator that is the unspecified product of two vectors. It can operate on a vector to produce either a scalar or vector product
an atom or group that has a valency of two
a group of two; couple
Word Origin for dyad
C17: from Late Latin dyas, from Greek duas two, a pair
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Medical definitions for dyad
dyad
[ dī′ăd′, -əd ]
n.
Two individuals or units regarded as a pair, such as a mother and a daughter.
A divalent atom or radical.
One pair of homologous chromosomes resulting from the division of a tetrad during meiosis.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.