- a group of two; couple; pair.
- 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.
- Chemistry. an element, atom, or group having a valence of two.Compare monad, triad(def 2a).
- Mathematics. two vectors with no symbol connecting them, usually considered as an operator.
- two persons involved in an ongoing relationship or interaction.
- the relationship or interaction itself.
- of two parts; dyadic.
Origin of dyad
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for dyad
The respondent was asked, Do you know that every Dyad is even?
Some Dyad was then produced, which the respondent did not know to be a Dyad; accordingly he did not know it to be even.
When you say a line, do you mean a dyad in length Form in Matter?
For either the dyad is not One; or else the monads included therein are not monads ἐντελεχείᾳ (a. 14).
There being six pairs of parallel edges on an octahedron, there are consequently six dyad axes of symmetry.
- 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
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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- 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.