D defs.my
Entry 2 senses Webster, 1913

Virulence

/vĭr'-əl-əns/ · Vir·u·lence · IPA /ˈvɪɹjələns/
01 n. The quality or state of being virulent or venomous; poisonousness; malignancy.
  1. 1.
    The quality or state of being virulent or venomous; poisonousness; malignancy.
  2. 2.
    Extreme bitterness or malignity of disposition.
    “The virulence of one declaimer, or the profundities and sublimities of the other.” I. Taylor.