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adj. Chemistry Divalent.

adj. Biology Consisting of a pair of homologous, synapsed chromosomes, as occurs during meiosis; double.

n. Biology A pair of homologous, synapsed chromosomes associated together during meiosis.

adj. Having a valence of 2.

adj. Of, or relating to a pair of homologous synapsed chromosomes that occur during meiosis.

n. Any bivalent chromosome.

adj. Equivalent in combining or displacing power to two atoms of hydrogen; dyad.

In chem., applied to an element an atom of which can replace two atoms of hydrogen or other univalent element, or to a radical which has the same valence as a bivalent atom.

In cytology, having double as distinguished from single (univalent) chromosomes in the oöcytes and spermatocytes, as in one of the varieties of the roundworm of the horse (Ascaris megalocephala).

adj. used of homologous chromosomes associated in pairs in synapsis

adj. having a valence of two or having two valences

"It is, in one of Sean's favorite expressions, a sport with a "bivalent" storyline, you know, where all the AM sports buffoons say stuff like "It's W's and L's, baby" and "horseshoes and hand grenades," etc."

univalent    polyvalent   

bivalency    bivalence   

dyad