from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An infectious particle, similar to but smaller than a virus, that consists solely of a strand of RNA and is capable of causing disease in plants.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. plant pathogens, of the order Viroidales, that consist of just a short section of RNA but without the protein coat typical of viruses
- n. human pathogen, most notably hepatitis D.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat
Sorry, no etymologies found.