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1. Genetics Relating to or being a pair of homologous, side-by-side chromosomes, especially during meiosis; double.
2. Chemistry & Immunology Divalent.

bi·va′lence, bi·va′len·cy n.


(baɪˈveɪləns; ˈbɪvə-)
(Logic) logic philosophy the semantic principle that there are exactly two truth values, so that every meaningful statement is either true or false. Compare many-valued logic
References in periodicals archive ?
1, the bivalence center ion Cu2+ is five-coordinate through four N atoms from two bidentate chelating Dione [Cu-N1 = 2.
A meeting I attended in 2005 entitled 'Islam, Women and Development' exemplified this bivalence.
Unlike Agamben, Derrida does not conceive of history as the outcome of the Kojevian man-animal bivalence, and certainly does not think of it as concluded:
In the first section, he develops an interpretation of the truth of sentences as based ontologically in the deeper underlying sense of the being of entities and formally-logically in the logical structure of language, and in the second part, he considers the ontological and temporal implications of this formal structure in terms of ontological realism predicated on the maintenance of bivalence, or the requirement that each statement be either true or false or both, with respect to ontological and temporal claims, leading to a realist and paradoxical account of the ontological basis of time as experienced and thought.
There is a familiar debate between Russell and Strawson concerning bivalence and "the present King of France.
Engaging this rich multi-lingual-cultural field, Aviva Taubenfeld charts Cahan's mode of "translinguification," while Sara Blair notes "the energetic bivalence of Cahan's dialect" as part of his "collage aesthetic," in the process revealing the implicit modernist aspect of Cahan's late-nineteenth-century fictions.
The first step on the journey is to realize that the key assumption of classical logic makes every proposition absolutely either true or false, an assumption called the principle of bivalence.
10) Note the difference between this statement and the law of bivalence, which says that, for any proposition P, either P is true or P is false.
In such work, the authors emphasize that logics is applied to those "vague and indefinite social facts" and remind that it is "not only a method, but it implies a new world vision that focus not only the bivalence, but also the polyvalence and, in this regard, it challenges the "probability monopoly" of the classical Aristotelian logic about the world".
Selon qu'on la considere en amont ou en aval de la decision judiciaire, cette idee de One Single Right Answer renvoie toujours a la notion trompeuse de bivalence juridique.
The ambivalence of our approach is justified by both bivalence communication, in generally, and also by bivalence own to intercultural communication, it meets both aspects: both affect the thinking of the party and the production and exchange of meanings (always culturally determined).
What kind of clear understanding can we expect to attain, however, if both determinism and its opposite are equally non-indicative of reality--if reality escapes logical bivalence (the theory that every meaningful proposition is either true or false, but not both)?