septupling

from The Collaborative International Dictionary of English v.0.48
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.
   [1913 Webster] Sepulcher
    

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