Source : Webster's Revised Unabridged Dictionary (1913)

Divisor \Di*vi"sor\, n. [L., fr. dividere. See {Divide}.]
   (Math.)
   The number by which the dividend is divided.

   {Common divisor}. (Math.) See under {Common}, a.

Source : WordNet®

divisor
     n 1: one of two or more integers that can be exactly divided into
          another integer; "what are the 4 factors of 6?" [syn: {factor}]
     2: the number by which a dividend is divided

Source : Free On-Line Dictionary of Computing

divisor
     
        A quantity that evenly divides another quantity.
     
        Unless otherwise stated, use of this term implies that the
        quantities involved are integers.  (For non-integers, the more
        general term {factor} may be more appropriate.)
     
         Example: 3 is a divisor of 15.
         Example: 3 is not a divisor of 14.
     
        (1997-03-07)