- 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
Some Dyad was then produced, which the respondent did not know to be a Dyad; accordingly he did not know it to be even.
The respondent was asked, Do you know that every Dyad is 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.