Virusoid

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A circular single-stranded RNA, similar but not identical to a viroid, dependent on plant viruses for replication and encapsidation.
  2. 2
    the smallest of viruses; a plant virus with its RNA arranged in a circular chromosome without a protein coat wordnet

Etymology

From virus + -oid.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.