Definition of viroid in English:


Syllabification: vi·roid
Pronunciation: /ˈvīˌroid


  • An infectious entity affecting plants, smaller than a virus and consisting only of nucleic acid without a protein coat.
    More example sentences
    • Prions do not contain DNA or RNA as do fungi, bacteria, viruses, viroids, or any other previously known infectious entities.
    • Fast, accurate tests, based on antibody testing technology, were developed for trichinosis in pigs; for anaplasmosis, a costly parasitic disease in cattle; and for plant viruses and viroids.
    • They include animals, insects, and nematodes (while vine diseases include the microbes bacteria, fungi, phytoplasma, viroids, and virus).

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Pronunciation: ˌastrəˈgāSHən
(in science fiction) navigation in outer space