1) Plant virus 2) The smallest of viruses 3) Virusoid
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1) Virusoid
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https://www.crosswordclues.com/clue/viroid
Viroids are plant pathogens that consist of a short stretch (a few hundred nucleobases) of highly complementary, circular, single-stranded RNA. Viroid genomes are extremely small in size, ranging from 246 to 467 nucleotides (nt), and consisting of fewer than 10,000 atoms. In comparison, the genome of the smallest known viruses capable of causing a...
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http://en.wikipedia.org/wiki/Viroid
Any of numerous kinds of small particles (250-400 nucleotides) of circular, single-stranded RNA that is unencapsidated and encodes no known proteins.
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http://ppathw3.cals.cornell.edu/glossary/Defs_V.htm
an infectious particle smaller than any of the known viruses, an agent of certain plant diseases. The particle consists only of an extremely small ... [2 related articles]
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http://www.britannica.com/eb/a-z/v/28
A plant pathogen that consists of a naked RNA molecule of approximately 250-350 nucleotides, whose extensive base pairing results in a nearly correct double helix. (See Satellite RNA.)
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<plant biology, virology> Extremely small viruses of plants. Their genome is a 240-350 nucleotide circular RNA strand, extensively base paired with itself, so they resist RNAase attack. ... At one time the term was also used casually of self replicative particles such as the kappa particle in Paramecium. ... (13 Oct 1997) ...
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(vi´roid) any of a class of infectious agents consisting of a small strand of RNA not associated with any protein. The RNA does not code for proteins and is not translated; it is replicated by host cell enzymes. Viroids are known to cause several plant diseases.
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A pathogenic agent that has virus-like properties composed only of a small amount of RNA and containing no protein; the RNA is reproduced during infection.
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Extremely small viruses of plants. Their genome is a 240-350 nucleotide circular RNA strand, extensively base-paired with itself, so they resist RNAase attack. At one time the term was also used casually of self-replicative particles such as the kappa particle in Paramecium .
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http://www.encyclo.co.uk/visitor-contributions.php
Type: Term Pronunciation: vī′royd Definitions: 1. An infectious pathogen of plants that is smaller than a virus (MW 75,000-100,000) and differs from one in that it consists only of single-stranded closed circular RNA, lacking a protein covering (capsid); replication does not depend on a helper virus, but is mediated by host cell enzymes....
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http://www.medilexicon.com/medicaldictionary.php?t=98722
A very exotic type of virus-like particle that only infects plant cells and consists of a group of membraneless circular RNAs that neither code for nor contain any structural protein. They replicate without other viruses being present.
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http://www.virology.net/ATVGlossary.html
[
n] - a plant virus with its RNA arranged in a circular chromosome without a protein coat
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http://www.webdictionary.co.uk/definition.php?query=viroid
infectious plant pathogen composed of RNA
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https://courses.lumenlearning.com/microbiology/chapter/glossary/
Viroids are infectious, virus-like entities which, unlike viruses, are proteinless. They can also cause a number of plant diseases. As with viruses, they are spread by vegetative propagation of the vines. See also under vine enemies.
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https://glossary.wein.plus/viroid
virusoid noun the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat
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https://www.encyclo.co.uk/local/20974
No exact match found.
