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Definition of: virulent
(vir′yə·lənt, vir′ə-) adjective
1. Manifesting or partaking of the nature of virus; exceedingly noxious.
2. Very bitter in enmity.
3. Med. Actively poisonous or infective; malignant.
4. Having or exhibiting virulence. See synonyms under BITTER1, MALICIOUS. [<L virulentus full of poison <virus a poison]
—vir′u·lent·ly adverb
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