vaccination

vac·ci·na·tion

noun \ˌvak-sə-ˈnā-shən\

Definition of VACCINATION

1

: the introduction into humans 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>

2

: the scar left by vaccinating