Definitions for viroidˈvaɪ rɔɪd
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Random House Webster's College Dictionary
vi•roidˈvaɪ rɔɪd(n.)
an infectious agent of plants similar to a virus but consisting of only a short, single strand of RNA without a protein coat.
Category: Microbiology
Princeton's WordNet
viroid, virusoid(noun)
the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat
Wiktionary
viroid(Noun)
plant pathogens, of the order Viroidales, that consist of just a short section of RNA but without the protein coat typical of viruses
viroid(Noun)
human pathogen, most notably hepatitis D.
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