Bivalent may refer to: * Bivalent (chemistry), a molecule formed from two or more atoms bound together *

Bivalent (engine) A bivalent engine is an engine that can use two different types of fuel. Examples are petroleum/CNG and petroleum/ LPG engines, which are widely available in the European passenger vehicle aftermarket. Types Alcohol and Petroleum Engines that ...

, an engine that can operate on two different types of fuel *

Bivalent (genetics) A bivalent is one pair of chromosomes (sister chromatids) in a tetrad. A tetrad is the association of a pair of homologous chromosomes (4 sister chromatids) physically held together by at least one DNA crossover. This physical attachment allows ...

, a pair of homologous chromosomes *

Bivalent logic In logic, the semantic principle (or law) of bivalence states that every declarative sentence expressing a proposition (of a theory under inspection) has exactly one truth value, either true or false. A logic satisfying this principle is calle ...

, a classical logic of two values, true and false * Bivalent vaccine, a vaccine directed at two pathogens or two strains of a pathogen *A verb with a valency of two

See also