duple

Adjective

Synonyms: double dual

WordNet 3.0

consisting of or involving two parts or components usually in pairs“an egg with a double yolk”“a double (binary) star”“double doors”“dual controls for pilot and copilot”“duple (or double) time consists of two (or a multiple of two) beats to a measure”Synonyms: double dual

Duple \Du"ple\, a. [L. duplus. See Double.] Double. [1913 Webster]

Duple ratio (Math.), that in which the antecedent term is double the consequent, as of 2 to 1, 8 to 4, etc. [1913 Webster]