- virusA submicroscopic, non-cellular structure that consists of a core of DNA or RNA surrounded by a protein coat, that requires a living host cell to replicate, and that sometimes causes disease in the host organism (such agents are often classed as nonliving infectious particles and less often as microorganisms).
- medusavirusA giant virus infecting amoebae causing them to shrivel and harden.
- viridGreen, verdant.