WordReference Random House Unabridged Dictionary of American English © 2026
vi•roid  (vī′roid),USA pronunciation n. 
  1. Microbiologyan infectious agent of plants similar to a virus but consisting of only a short, single strand of RNA without a protein coat.
  • vir(us) + -oid 1946

'viroid' also found in these entries (note: many are not synonyms or translations):
virusoid

Forum discussions with the word(s) "viroid" in the title:


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