An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) Chem.: Having a → valence of two or having two valences.
2) → bivalent logic.

→ bi-; → valence.

A logical system, such as → classical logic, in which every declarative sentence expressing a → proposition has exactly one → truth value, either → true or → false. Bivalent logic is just a sub-set of a more powerful type of logic known as → fuzzy logic. See also → polyvalent logic.

→ bivalent; → logic.