noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A single individual particle of a virus (the viral equivalent of a cell).
2. 2
   (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses) wordnet

Etymology

From French virion. By surface analysis, virus + -on.

Related phrases

naked virion

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