vbl. sb. [f. QUADRUPLE v. + -ING1.] The action of the vb.

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1694.  Phil. Trans., XVIII. 70. The doubling, trebling, quadrupling, &c. of Rations is performed by squaring, cubing, biquadrating, &c. of the terms.

2

1885.  Pall Mall Gaz., 27 March, 1/1. Supplemented, say, by the quadrupling of our field artillery.

3