Definition of dyad in English:



  • 1Something that consists of two elements or parts.

    ‘the mother–child dyad’
    • ‘You see, with one particular male-female dyad, provocative tensions were escalating rapidly.’
    • ‘They seem to embody a kind of masculine/feminine dyad, and their colour scheme draws attention to this even further.’
    • ‘It follows, therefore, that the amount of support a child receives within this same-sex dyad would be a major determinant of psychosocial development and health over an individual's life course.’
    • ‘Philippe's refrains create a sort of hyper-personal, us-against-the-world dyad, reassuring Charles of his loyalty ‘no matter what people say.’’
    • ‘The four interviewer demographic characteristics were also used to construct an overall index of social distance for each respondent-interviewer dyad.’
    • ‘This index of association results in values ranging from - 1 to 1, of individuals in each dyad.’
    • ‘To avoid pseudoreplication, we included each dyad into the analysis only once.’
    • ‘A lack of awareness of this, and of the importance of protecting the mother-child dyad, can further contribute to a new father's role confusion.’
    • ‘The real intention behind this democracy/protest dyad is to tap the conviction of the protesters for some kind of warped endorsement of the very system they are protesting against.’
    • ‘Preexisting vulnerabilities and individual characteristics may intensify role disruption and interpersonal conflict in the couple dyad, while reducing relationship functioning.’
    • ‘Previous studies have also suggested that gender composition of sibling dyads are important variables to consider, but findings have been mixed.’
    • ‘The hospital stay of the mother-infant dyad should be long enough to allow identification of early problems and to ensure that the family is able and prepared to care for the infant at home.’
    • ‘The praise/critique dyad is a building block for personal growth; untempered praise is a poor foundation for life or a love of learning.’
    • ‘One member of each dyad will be the tyrant, and the other will be the tyrannized.’
    • ‘Twenty-two mother-child dyads participated in the study.’
    • ‘Intraclass correlation coefficients were calculated on one reliability file per dyad.’
    • ‘Traditionally, studies of animal communication have considered a receiver - signaler dyad.’
    • ‘Separate contingency analyses were performed for each therapist-mother dyad.’
    • ‘Mother/infant dyads were recruited from the nursery of an inner city hospital.’
    • ‘Specifically, the model appears to be inadequate in explaining or predicting the influence that results when peer dyads are composed of aggressive and nonaggressive children.’
    pair, duo, duology, twosome, set of two, match
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    1. 1.1Mathematics An operator which is a combination of two vectors.
      • ‘Data transformations can fuel fears that the trends noted with the transformation-averaging over serial dyads in this case - do not reflect trends in the raw data.’
    2. 1.2Chemistry A divalent atom or radical.
      • ‘A nuclear protein binds selectively to the dyad Gpal element.’
      • ‘The enzyme is active as a dimer with two symmetry-related active sites, each featuring a Cys-His catalytic dyad and a selectivity loop, which recognizes the characteristic DEVD pattern of the substrate.’


Late 17th century (originally denoting the number two or a pair): from late Latin dyas, dyad-, from Greek duas, from duo ‘two’. Current senses date from the late 19th century.