Source : Webster's Revised Unabridged Dictionary (1913)

Septenary \Sep"ten*a*ry\, a. [L. septenairus, from septeni seven
   each, septem seven: cf. F. sept['e]naire. See {Seven}. ]
   1. Consisting of, or relating to, seven; as, a septenary
      number. --I. Watts.

   2. Lasting seven years; continuing seven years. ``Septenary
      penance.'' --Fuller.

Septenary \Sep"ten*a*ry\, n.
   The number seven. [R.] --Holinshed.