Dū'ple, a.

adjective

(dūʹpl), a. [Lat. duplus.] Double.

Duple ratio (Math.), that in which the antecedent term is double the consequent, as of 2 to 1, 8 to 4, &c. — Subduple ratio, the reverse of duple ratio, as of 1 to 2, 4 to 8, &c.