ˌ ̷ ̷ ̷ ̷ˈnāshən noun
( -s )
Etymology: French, from vaccine, adjective (from New Latin vaccinus ) + -ation
: the introduction into man or domestic animals of microorganisms that have previously been treated to make them harmless for the purpose of inducing the development of immunity
oral vaccination
vaccination against smallpox
vaccination for whooping cough