dyad


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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 ?
Because kappa coefficients cannot be averaged across dyads, a separate matrix of interobserver agreement values is presented for Dyads A and B, and presented textually for Dyad C below.
When a child-caretaker dyad was ready to enter the experimental arm of the study, the student arranged a home visit by the LMT participating in the project.
reduce isolate activity to 20 minutes; increase dyad play to 10 minutes; and keep, for the time being, group play at 0 minutes).
With each category in special education the characteristics of the children involved in social interactions and the influence of environmental factors will affect the disposition of the bully/disability dyad.
14, but the analysis also yielded three significant two-way interactions of gender by dyad type, F(1, 108) = 22.
On the other hand, a discussion by Dansereau and Markham (1987) suggested that an alternative model, and one perhaps more potentially useful to the entrepreneur, for understanding communication between supervisors and subordinates may arise from the dyad tradition, which examines the supervisor-subordinate relationship as a distinct pairing.
The festival ended with Hex// DiVision - a science fiction "ritual" conducted by ManMachines called Dyads.
It's all centered on the DYAD AVS (Advanced Vectoring System) cam system.
A lead or warm call takes place when there is some indication of a customer's interest or an introduction from someone outside of the dyad.
In only three of these dyads did we capture both of the individuals on the same grid together during more than one session, and in only one dyad did we capture them on the same grid together during a third year.
We used 56 samples (from cervix in women and urethra in men) from 28 dyads in which persons within each dyad were concordant for C.
CLINICAL--In clinical informatics, the complex nature of the interaction between the technical and clinical processes is causing the traditional dyad to evolve to a model that commonly includes three disciplines.