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 ?
Second, specific combination dyads for which significant differences in body weight at tagging were measured but no difference in body weight at harvesting were detected.
Fidelity of implementation across dyads for (a) probe sessions was 99-100%, (b) 99-100% for PTD peer preference instruction, 98100% for baseline (sharing), and 97-100% for PTD sharing instruction, and (c) 100% for generalization sessions.
In dyads A, C and D, parents and children have similar attitudes towards APC.
Thus, the analytic sample included 69 PwMCI-CP dyads from 125 families (55 PwMCI-SCP and 14 PwMCI-ACCP pairs; 55% response rate).
For this design-based study, we made three conceptual and structural shifts in traditional opportunities for CT-PST dyads to interact with one another and a larger community of dyads.
Of the total of 70 dyads of full sibs with known geographic locations, individuals within a dyad were separated by a mean distance of 7.
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.
Dyads, triads and small "working team" groups can all be effective.
That is, all dyads in the present study showed some weakening in the strength of their working alliance.
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.