Noun virulency has 2 senses
  1. virulence, virulency - extreme harmfulness (as the capacity of a microorganism to cause disease); "the virulence of the plague"
    --1 is a kind of harmfulness, injuriousness
  2. virulence, virulency - extreme hostility; "the virulence of the malicious old man"
    --2 is a kind of hostility, ill will
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