A genus of virus, specifically the virus that causes smallpox, named for the cytoplasmic inclusions it creates.
From cyto- (Greek kytos, 'cell') + -ryctes (Greek ryptēs, 'digger' or 'excavator'). This genus name reflects how these viruses appear to burrow or dig into cellular material, creating visible lesions.
Before modern virology identified DNA and RNA, scientists named viruses based on what they could see under microscopes, and cytoryctes literally means 'cell digger' because it seemed to gnaw away at cells!
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