- nounvaccine (noun) · vaccines (plural noun)
- a substance used to stimulate immunity to a particular infectious disease or pathogen, typically prepared from an inactivated or weakened form of the causative agent or from its constituents or products:"every year the flu vaccine is modified to deal with new strains of the virus" · "we are working right now to develop a new vaccine" · "vials of vaccine in insulated cartons"
- computinga program designed to detect computer viruses and inactivate them:"the rate of use of vaccines for computer viruses is not as high as in the US, Japan, and other countries"
Originlate 18th century: from Latin vaccinus, from vacca ‘cow’ (because of the early use of the cowpox virus against smallpox).Similar and Opposite Wordsnoun- a substance used to stimulate immunity to a particular infectious disease or pathogen, typically prepared from an inactivated or weakened form of the causative agent or from its constituents or products:
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