Main Entry: vac·ci·na·tion

Pronunciation: \ˌvak-sə-ˈnā-shən\

Function: noun

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