The Collaborative International Dictionary of English v.0.48:

Sorbefacient \Sor`be*fa"cient\, a. [L. sorbere to suck in,
   absorb + faciens, p. pr. of facere to make.] (Med.)
   Producing absorption. -- n. A medicine or substance which
   produces absorption.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sorbefacient
    adj 1: inducing or promoting absorption [syn: absorbefacient,
           sorbefacient]