The Collaborative International Dictionary of English v.0.48:
Digestible \Di*gest"i*ble\, a. [F. digestible, L. digestibilis.] Capable of being digested. [1913 Webster]WordNet (r) 3.0 (2006):
digestible adj 1: capable of being converted into assimilable condition in the alimentary canal [ant: indigestible]