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dy·ad

(dī'ad),
1. A pair. Synonym(s): diad (2)
2. In chemistry, a bivalent element, molecule, or ion.
3. Two people in an interactional situation, for example, patient and therapist, husband and wife.
4. The double chromosome resulting from division in meiosis.
5. Two units treated as one.
6. A pair of cells resulting from the first meitotic division.
7. The transverse tubule and a terminal cisterna in cardiac muscle cells.
[G. dyas, the number two, duality]

dyad

/dy·ad/ (di´ad) a double chromosome resulting from the halving of a tetrad.

dyad

(dī′ăd′, -əd)
n.
1. Two individuals or units regarded as a pair: the mother-daughter dyad.
2. Biology One pair of homologous chromosomes resulting from the division of a tetrad during meiosis.
3. Mathematics
a. A function that draws a correspondence from any vector u to the vector (v·u)w and is denoted vw, where v and w are a fixed pair of vectors and v·u is the scalar product of v and u. For example, if v = (2,3,1), w = (0,-1,4), and u = (a,b,c), then the dyad vw draws a correspondence from u to (2a + 3b + c)w.
b. A tensor formed from a vector in a vector space and a linear functional on that vector space.
adj.
Made up of two units.

dyad

[dī′ad]
Etymology: Gk, dyas, two
one of the paired homologous chromosomes, consisting of two chromatids, that result from the division of a tetrad in the first meiotic division of gametogenesis. dyadic, adj.

dyad

Psychiatry A 2-person relationship–eg, a therapeutic relationship between doctor and Pt in psychotherapy. See Folie á dieux. Cf Shared delusion.

dy·ad

(dī'ad)
1. A pair.
Synonym(s): diad (2) .
2. chemistry A bivalent element.
3. Two people in an interactional situation, e.g., patient and therapist, husband and wife.
4. The double chromosome resulting from the splitting of a tetrad during meiosis.
[G. dyas, the number two, duality]

dyad

a chromosome consisting of two sister CHROMATIDS joined at their centromere which is produced after DISJUNCTION.
References in periodicals archive ?
These data were not used analytically to refute or support the dyads, specifically, but rather used as another perspective into candidate growth.
Two variable characteristics of transfer dyads affect the efficiency and effectiveness of lateral innovation transfers: the degree of absorptive capacity (Cohen and Levinthal 1990), and dyadic willingness.
The microsystem dyads themselves recently evaluated the 2010 department lead job description.
We captured the full sibs in only 22 of the total of 71 dyads of full sibs on the same grid in the same session, and, in 34 of the 71 dyads, on the same grid in the same year but not necessarily within the same session.
For the MLST study, we used remainder samples from 56 members of 28 dyads who were concordant for C.
Dyads, triads and small "working team" groups can all be effective.
Supervisory dyads were formed when an eligible supervisor and an eligible supervisee under his or her supervision agreed to participate in this study via written informed consent.
Examination of interventions that used military force against a fellow ASEAN regime and statistics from all conflict dyads shows that out of 139 conflict dyads between ASEAN countries and their domestic challengers, there has not been a single case in which another ASEAN country has supported the rebel side with troops.
1 Market Impact of Dyads - The Single Layer Goal and Reducing the Cost
Because kappa values cannot be averaged across sessions, dyads, or raters, "overall" kappa values were used in this study.
The Baby Friendly Initiative has announced a review of the available evidence regarding the benefits of skin to skin contact (SSC) in the early postnatal period has been carried out to assess its effects on breastfeeding, behaviour, and physiological adaptation in healthy mother-newborn dyads.