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Webster 1913 Edition

Adj.

(Math.)

Expressed by the square root; – said of ratios.

Subduplicate ratio

the ratio of the square roots, or the square root of a ratio;

thus, the

subduplicate ratio

of a to b is √a to √b, or √

a/b

Adj.

[sub and duplicate.] Having the ratio of the square roots.

subduplicate ‎(not comparable)