Breadcrumb Home > Thesaurus > P Synonyms of prion Find synonyms for: Noun1. prion, particle, subatomic particleusage: (microbiology) an infectious protein particle similar to a virus but lacking nucleic acid; thought to be the agent responsible for scrapie and other degenerative diseases of the nervous systemWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of prion (Dictionary) ✖ Related Content Daily Word Quiz: sepulture Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language