The Collaborative International Dictionary of English v.0.48:
Digestibility \Di*gest`i*bil"i*ty\, n. The quality of being digestible. [1913 Webster]WordNet (r) 3.0 (2006):
digestibility n 1: the property of being easy to digest [syn: digestibility, digestibleness] [ant: indigestibility, indigestibleness]