vaccinal

adjective

vac·​ci·​nal ˈvak-sə-nᵊl  vak-ˈsē- 

: of or relating to vaccine or vaccination

a vaccine with vaccinal efficacy of 95 percent

Word History

Etymology

vaccine + -al entry 1, probably after French vaccinal

First Known Use

circa 1860, in the meaning defined above

Medical Definition

vaccinal

adjective

vac·​ci·​nal ˈvak-sən-ᵊl  vak-ˈsēn- 

: of or relating to vaccine or vaccination

a vaccinal allergy

vaccinal control of a disease