dyad

[ dahy-ad ]

/ ˈdaɪ æd /

SEE SYNONYMS FOR dyad ON THESAURUS.COM

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.

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.

Sociology.

two persons involved in an ongoing relationship or interaction.
the relationship or interaction itself.

adjective

of two parts; dyadic.

Sometimes di·ad .

Origin of dyad

First recorded in 1665–75; from Greek dyad- (stem of dyás ) “pair,” equivalent to dý(o) “two” + -ad- noun suffix; see origin at two, -ad¹

Words nearby dyad

dwt, dwy, Dx, DX code, Dy, dyad, dyadic, dyadic system, Dyak, dyarchy, Dyaus

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for dyad

In figure 130 one lagging chromosome shows the dyad nature of the products of the division of the tetrad.
Studies in Spermatogenesis (Part 1 of 2)|Nettie Maria Stevens
There are five axes of symmetry, one tetrad and two pairs of dyad, each perpendicular to a plane of symmetry.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various
Perpendicular to the hexad axis are six dyad axes of two kinds and each perpendicular to a vertical plane of symmetry.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various
They are parallel to the edges of the cube, and in the different classes coincide either with tetrad or dyad axes of symmetry.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various

Here there is only one dyad axis in which two planes of symmetry intersect.
Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7|Various

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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

单词	dyad
释义	dyad [ dahy-ad ] / ˈdaɪ æd / SEE SYNONYMS FOR dyad ON THESAURUS.COM 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. 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. Sociology. two persons involved in an ongoing relationship or interaction. the relationship or interaction itself. adjective of two parts; dyadic. Sometimes di·ad . Origin of dyad First recorded in 1665–75; from Greek dyad- (stem of dyás ) “pair,” equivalent to dý(o) “two” + -ad- noun suffix; see origin at two, -ad¹ Words nearby dyad dwt, dwy, Dx, DX code, Dy, dyad, dyadic, dyadic system, Dyak, dyarchy, Dyaus Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for dyad In figure 130 one lagging chromosome shows the dyad nature of the products of the division of the tetrad. Studies in Spermatogenesis (Part 1 of 2)\|Nettie Maria Stevens There are five axes of symmetry, one tetrad and two pairs of dyad, each perpendicular to a plane of symmetry. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various Perpendicular to the hexad axis are six dyad axes of two kinds and each perpendicular to a vertical plane of symmetry. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various They are parallel to the edges of the cube, and in the different classes coincide either with tetrad or dyad axes of symmetry. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various Here there is only one dyad axis in which two planes of symmetry intersect. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7\|Various 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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Words related to dyad combination, duo, couple, two, team, match, pair, double, set, twosome, span, combine, yoke, brace, duality, mates, twins, combo, deuce, doublet 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.
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dyad

noun

adjective

Origin of dyad

Words nearby dyad

Example sentences from the Web for dyad

British Dictionary definitions for dyad

noun

Word Origin for dyad

Words related to dyad

Medical definitions for dyad

n.