Source : Webster's Revised Unabridged Dictionary (1913)

Digestive \Di*gest"ive\, a. [F. digestif, L. digestivus.]
   Pertaining to digestion; having the power to cause or promote
   digestion; as, the digestive ferments.

         Digestive cheese and fruit there sure will be. --B.
                                                  Jonson.

   {Digestive apparatus}, the organs of food digestion, esp. the
      alimentary canal and glands connected with it.

   {Digestive salt}, the chloride of potassium.

Digestive \Di*gest"ive\, n.
   1. That which aids digestion, as a food or medicine.
      --Chaucer.

            That digestive [a cigar] had become to me as
            necessary as the meal itself.         --Blackw. Mag.

   2. (Med.)
      (a) A substance which, when applied to a wound or ulcer,
          promotes suppuration. --Dunglison.
      (b) A tonic. [R.]

Source : WordNet®

digestive
     adj : relating to or having the power to cause or promote
           digestion; "digestive juices"; "a digestive enzyme";
           "digestive ferment"