dyad


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

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 ?
Thus the compensatory like growth levels for every combination dyad were also determined by this index size.
PTD could be used to teach young children with SCD to share tokens in a dyad arrangement, replicating and extending the findings of Ledford and Wolery (2015), who used PTD to teach children with typical development to share tokens during small group instruction.
The dyad answered to all the questions of the APC acknowledging that the activity made them reflect upon new themes (STSE) and lead them to collaborate more than they usually did in homework.
Understanding how PwMCIs and their CPs, as dyads, perceive mild cognitive impairment is important because disparities in illness appraisal by care recipients and CPs--regardless of the accuracy of reports--may have negative consequences for psychological and physical outcomes of both parties.
Contextually, the CT and PST participated in divergent discourse communities, or communities with views of science teaching and collegial interactions that appeared to the dyad to be diametrically opposed.
6%) of all 71 dyads, with a mean and maximum geographic distance between sibs of a dyad of 359.
The Table shows the distribution of MLST STs and ompA genotypes for each dyad with SNP location(s), if present, for each of the 7 MLST housekeeping genes.
The average household income for the census dissemination area (DA) where the dyad lived provided a proxy for the dyad's socio-economic status.
The war with Dyad is all but lost when Rachel's latest ploy forces a broken Sarah to concede.
The important question for each dyad became how effectively they repaired such weakening.
Supervisors and supervisees participated in this study as a supervisory dyad or pair.