Definition of dyad in English:



  • 1Something that consists of two elements or parts.

    ‘the mother–child dyad’
    • ‘Intraclass correlation coefficients were calculated on one reliability file per dyad.’
    • ‘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.’
    • ‘Traditionally, studies of animal communication have considered a receiver - signaler dyad.’
    • ‘Preexisting vulnerabilities and individual characteristics may intensify role disruption and interpersonal conflict in the couple dyad, while reducing relationship functioning.’
    • ‘You see, with one particular male-female dyad, provocative tensions were escalating rapidly.’
    • ‘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.’
    • ‘This index of association results in values ranging from - 1 to 1, of individuals in each dyad.’
    • ‘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.’
    • ‘The four interviewer demographic characteristics were also used to construct an overall index of social distance for each respondent-interviewer dyad.’
    • ‘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 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.’
    • ‘To avoid pseudoreplication, we included each dyad into the analysis only once.’
    • ‘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 praise/critique dyad is a building block for personal growth; untempered praise is a poor foundation for life or a love of learning.’
    • ‘They seem to embody a kind of masculine/feminine dyad, and their colour scheme draws attention to this even further.’
    • ‘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.’
    • ‘Previous studies have also suggested that gender composition of sibling dyads are important variables to consider, but findings have been mixed.’
    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.
      • ‘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.’
      • ‘A nuclear protein binds selectively to the dyad Gpal element.’


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.