Subtriplicate \Sub*trip"li*cate\, a. (Math.) Expressed by the cube root; -- said especially of ratios. [1913 Webster]

Subtriplicate ratio, the ratio of the cube root; thus, the subtriplicate ratio of a to b is [cuberoot]a to [cuberoot]b, or [cuberoot]a/b. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Subtriplicate \Sub*trip"li*cate\, a. (Math.) Expressed by the cube root; -- said especially of ratios.

Subtriplicate ratio, the ratio of the cube root; thus, the subtriplicate ratio of a to b is [cuberoot]a to [cuberoot]b, or [cuberoot]a/b.

Source: Webster's Revised Unabridged Dictionary (1913)