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A protein particle that is the agent of infection in a variety of neurodegenerative diseases, including bovine spongiform encephalopathy, Creutzfeldt-Jakob disease, and scrapie. Prions are the only known infectious agents that do not contain DNA or RNA. They derive from a normal body protein that becomes irreversibly misfolded, and they proliferate in the body, possibly by acting as a template for further protein misfolding.
[Alteration of pro(teinaceous) in(fectious particle).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Animals) any of various dovelike petrels of the genus Pachyptila of the southern oceans that have a serrated bill
[C19: New Latin, from Greek priōn a saw]
(Microbiology) a protein in the brain, an abnormal form of which is thought to be the transmissible agent responsible for certain spongiform encephalopathies, such as BSE, scrapie, Creutzfeldt-Jakob disease, and kuru
[C20: altered from pro(teinaceous) in(fectious particle)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
pri•on(ˈpri ɒn, ˈpraɪ-)
a tiny proteinaceous particle, likened to viruses and viroids, but having no genetic component, thought to be an infectious agent in bovine spongiform encephalopathy, Creutzfeldt-Jakob disease, and similar encephalopathies.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A particle composed of protein, similar to a virus but lacking DNA or RNA. Prions are thought to be the agent of infection of some diseases of the nervous system.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||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|
microbiology - the branch of biology that studies microorganisms and their effects on humans
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
n → Prion nt; prion protein → Prion-Protein nt
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
prionn prion or prión m
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.