Source : Webster's Revised Unabridged Dictionary (1913)

Aperient \A*pe"ri*ent\, a. [L. aperiens, p. pr. of aperire to
   uncover, open; ab + parire, parere, to bring forth, produce.
   Cf. {Cover}, {Overt}.] (Med.)
   Gently opening the bowels; laxative. -- n. An aperient
   medicine or food. --Arbuthnot.

Source : WordNet®

aperient
     adj : mildly laxative
     n : a purging medicine; stimulates evacuation of the bowels
         [syn: {purgative}, {cathartic}, {physic}]