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n. Two individuals or units regarded as a pair: the mother-daughter dyad.

n. Biology One pair of homologous chromosomes resulting from the division of a tetrad during meiosis.

n. Chemistry A divalent atom or radical.

n. Mathematics 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.

n. Mathematics A tensor formed from a vector in a vector space and a linear functional on that vector space.

adj. Made up of two units.

n. A set of two different elements.

n. any set of two different pitch classes.

n. A pair of things standing in particular relation; dyadic relation.

n. Two units treated as one; a couple; a pair.

n. An element, atom, or radical having a valence or combining power of two.

adj. Having a valence or combining power of two; capable of being substituted for, combined with, or replaced by, two atoms of hydrogen. See valence.

n. Two units treated as one; a pair; a couple.

n. In chem., an elementary substance each of whose atoms, in combining with other atoms or molecules, is equivalent in saturating power to two atoms of hydrogen.

n. In morphology, a secondary unit of organization, resulting from individuation or integration of an aggregate of monads. See monad.

n. In mathematics, an expression signifying the operation of multiplying internally by one vector and then by another.

Same as dyadic.

n. A group or association of two chromosomes in certain cells, such as the germ-cells in certain stages.

n. In prosody, a group of two lines having different rhythms.

Noting an axis of twofold symmetry. See symmetry.

n. two items of the same kind

"For example, "the dyad" is the term Murray used for the experiment he performed on Kaczynski and other students."

2    two    deuce    ii   

pythagorean dyad    hexachord    tetrachord    triad    interval    monad    trichord   

valence   

doubleton   

dyadic   

couple    pair   

triad   

duad    predicable    monad    costimulatory    mind    bijou    cell-adhesion    co-stimulatory    diatomic    dryad