virulent
UK /ˈvɪɹ(j)ʊl(ə)nt/ · US /ˈvɪɹ(j)ələnt/ adjective
- adjective Of animals, plants, or substances: extremely venomous or poisonous.
- adjective (figurative) Extremely hostile or malicious; intensely acrimonious. “The politicians were virulent in their hatred of the president.”
- adjective (medicine) Of a disease or disease-causing agent: malignant, able to cause damage to the host.
- adjective (microbiology) Of a pathogen: replicating within its host cell, then immediately causing it to undergo lysis.
Synonyms
deadly venomous acerb acerbic acid acrid bitter blistering caustic sulfurous sulphurous vitriolic
Antonyms
Etymology
From Middle English virulent (“leaking or seeping pus, purulent; (of putrefaction) extremely severe (sense uncertain)”) [and other forms], borrowed from Latin vīrulentus (“poisonous”), from vīrus (“poison; venom; slime, slimy liquid; stinking smell; nasty taste”) (ultimately from Proto-Indo-European *wisós (“poison; slime; fluidity”)) + -ulentus (suffix meaning ‘abounding in, full of’, forming adjectives).
Sense 4 (“of a pathogen: replicating within its host cell, then immediately causing it to undergo lysis”) is derived from French virulent, which was first used in this sense by the French biologist François Jacob (1920–2013) and his co-authors in a 1953 article.
Webster’s 1913
- adjective Extremely poisonous or venomous; very active in doing injury.
- adjective Very bitter in enmity; actuated by a desire to injure; malignant; as, a virulent invective.
Etymology [L. virulentus, fr. virus poison: cf. F. virulent. See Virus.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “virulent”, CC BY-SA 4.0. Details