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viroid

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noun vi·roid \ˈvī-ˌrȯid\

Definition of viroid

  1. :  any of two families (Pospiviroidae and Avsunviroidae) of subviral particles that consist of a small single-stranded RNA arranged in a closed loop without a protein shell and that replicate in their host plants where they may or may not be pathogenic



Origin and Etymology of viroid

New Latin virus + English -oid


First Known Use: 1971


Medical Dictionary

1

viroid

play
noun vi·roid \ˈvī-ˌrȯid\

Medical Definition of viroid

  1. 1:  a hypothetical symbiont resembling a virus that was formerly held to be present in cells, to be favorable to the host, and to tend to mutate to a virus

  2. 2:  any of two families (Pospiviroidae and Avsunviroidae) of subviral particles that consist of a small single-stranded RNA arranged in a closed loop without a protein shell and that replicate in their host plants where they may or may not be pathogenic




2

viroid

adjective vi·roid

Medical Definition of viroid

  1. 1:  caused by a virus <viroid pneumonia>

  2. 2:  of or relating to viroids




Learn More about viroid

  1. Medical Dictionary: Definition of viroid Britannica.com: Encyclopedia article about viroid


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