Sesquiplicate
Pronunciation : Ses*quip"li*cate
Part of Speech : a.
Etymology : [Sesqui- + plicate.] (Math.)
Definition : Defn: Subduplicate of the triplicate; -- a term applied to ratios; thus, a and a' are in the sesquiplicate ratio of b and b', when a is to a' as the square root of the cube of b is to the square root of the cube of b', or a:a'::sq. rootb3:sq. rootb'3. The periodic times of the planets are in the sesquiplicate ratio of their mean distances. Sir I. Newton.
Source : Webster's Unabridged Dictionary, 1913