SESQUIPLICATE

sesquiplicate. Sesquiplicate, a. in the ration of one and a half to one

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Ses‐quip″li‐cate (?), a. [[Sesqui- + plicate.]] (Math.) 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′::√b3:√b′3. The periodic times of the planets are in the sesquiplicate ratio of their mean distances. Sir I. Newton.