pri·on
noun/ˈpriːɒn/
/ˈpriːɑːn/
(biology)- a very small unit of protein that is believed to be the cause of brain diseases such as BSE, CJD and scrapie
普里昂，蛋白质感染粒，朊病毒（能导致脑病） Word Origin1980s: by rearrangement of elements from pro(teinaceous) in(fectious particle).