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.
[1913 Webster]