Source : Webster's Revised Unabridged Dictionary (1913)

Succus \Suc"cus\, n.; pl. {Succi}. (Med.)
   The expressed juice of a plant, for medicinal use.

   {Succus entericus}. [NL., literally, juice of the
      intestines.] (Physiol.) A fluid secreted in small by
      certain glands (probably the glands of Lieberk["u]hn) of
      the small intestines. Its exact action is somewhat
      doubtful.

Source : WordNet®

succus
     n : any of several liquids of the body; "digestive juices" [syn:
          {juice}]