Webster’s Revised Unabridged Dictionary · 1913
Quadruplicate
Quad·ru′pli·cate, v. t. [imp. & p. p. Quadruplicated; p. pr. & vb. n. Quadruplicating.] [L. quadruplicatus, p. p. of quadruplicare, fr. quadruple? fourfold. See Quadruplex.] To make fourfold; to double twice; to quadruple.
Quad·ru′pli·cate (·kāt), a. [L. quadruplicatus, p. p.]
1. Fourfold; doubled twice; four times repeated; as, a quadruplicate ratio, or a quadruplicate proportion.
2. (Math.) Raised to the fourth power. [R.]