viroid

viroid

English

Etymology

Etymology tree
English virus
Ancient Greek -ο- (-o-)der.
Latin -o-
Proto-Indo-European *weyd-
Proto-Indo-European *-os
Proto-Indo-European *wéydos
Proto-Hellenic *wéidos
Ancient Greek εἶδος (eîdos)
Proto-Indo-European *-os
Proto-Indo-European *-ēs
Ancient Greek -ης (-ēs)
Ancient Greek -ειδής (-eidḗs)
Latin -oīdēslbor.
English -oid
English viroid

    From virus + -oid.

    Noun

    viroid (plural viroids) (virology)

    2. Any of many short sections of RNA, but without the protein coat typical of viruses (the capsid), that are plant pathogens.
      Synonym: Viroidales
    4. Any of certain defective viruses, such as hepatitis D, a human pathogen.

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