(n) any enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis, Syn. proteolytic enzyme, peptidase, proteinase
The Collaborative International Dictionary of English (GCIDE) v.0.53 Collaborative International Dictionary (GCIDE)
a. [ Proteid + Gr. &unr_; to loose. ] (Physiol.) Converting proteid or albuminous matter into soluble and diffusible products, as peptones. “ The proteolytic ferment of the pancreas.” Foster. [ 1913 Webster ]