[f. ppl. stem of L. quadruplicāre: see prec.]
1. trans. To multiply by four; to make four times as many or as great; to quadruple.
1661. in Blount, Glossogr. (ed. 2).
1674. Jeake, Arith. (1696), 56. Or else duplicate, triplicate, quadruplicate, &c. the Fraction according to the given Integer.
1694. Salmon, Bate’s Dispens. (1713), 327/2. Sometimes the Proportion is to be quadruplicated.
1861. [F. W. Robinson], Under the Spell, III. 220. Prices ‘were “quadruplicated,”’ the demand for places being great.
1888. G. W. Cable, in Amer. Missionary, April, 90. If you knew the national value of this work, to say nothing of its gospel value, you would quadruplicate it before the year is out.
2. To make or provide in quadruplicate; to provide four (things) exactly alike.
1879. G. Meredith, Egoist, III. iii. 64. We are in danger of duplicating and triplicating and quadruplicating [wedding presents].
Hence Quadruplicating vbl. sb. (Ash, Suppl., 1775).
