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virulent

American  
[vir-yuh-luhnt, vir-uh-] / ˈvɪr yə lənt, ˈvɪr ə- /

adjective

  1. actively poisonous; intensely noxious.

    a virulent insect bite.

    Synonyms:
    venomous
    Antonyms:
    harmless
  2. Medicine/Medical. highly infective; malignant or deadly.

  3. Bacteriology. causing clinical symptoms.

  4. violently or spitefully hostile.

  5. intensely bitter, spiteful, or malicious.

    a virulent attack.

    Synonyms:
    acerbic, vicious

virulent British  
/ ˈvɪrʊlənt /

adjective

    1. (of a microorganism) extremely infective

    2. (of a disease) having a rapid course and violent effect

  1. extremely poisonous, injurious, etc

  2. extremely bitter, hostile, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • hypervirulent adjective
  • hypervirulently adverb
  • nonvirulent adjective
  • nonvirulently adverb
  • supervirulent adjective
  • supervirulently adverb
  • unvirulent adjective
  • unvirulently adverb
  • virulently adverb

Etymology

Origin of virulent

1350–1400; Middle English verulent < Latin vīrulentus, equivalent to vīr ( us ) poison ( virus ) + -ulentus -ulent

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"Fusarium wilt -- also known as Panama disease -- is a destructive soil-borne disease which impacts farmed Cavendish bananas worldwide through its virulent Race 4 strains," Dr. Chen said.

From Science Daily

But time travel is an imperfect science, and the technician overseeing the process is delirious from a virulent new strain of flu, so Kivrin is accidentally dropped into 1348, the year of the Black Death.

From The Wall Street Journal

But in the sentencing, Judge Richard Marks KC said the case involved "recklessness on a very high scale and language of a virulent nature".

From BBC

It said there had been outbreaks on wards and the dominant strain was "particularly virulent".

From BBC

"This is a particularly virulent strain of influenza and there are lots of children experiencing very high temperatures and they are experiencing the flu for much longer than we would expect."

From BBC