Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun prion

1 sense of prion

Sense 1
prion -- ((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 system)
       => particle, subatomic particle -- (a body having finite mass and internal structure but negligible dimensions)