Source : Webster's Revised Unabridged Dictionary (1913)

Septuple \Sep"tu*ple\, a. [LL. septuplus; cf. Gr. ?????:cf. F.
   septuple. Cf. {Double}, {Quadruple}.]
   Seven times as much; multiplied by seven; sevenfold.

Septuple \Sep"tu*ple\, v. t. [imp. & p. p. {Septupled}; p. pr. &
   vb. n. {Septupling}.]
   To multiply by seven; to make sevenfold. --Sir J. Herschel.

Source : WordNet®

septuple
     adj : having seven units or components [syn: {sevenfold}]