[vac.cine] n [L vaccinus, adj., of or from cows, fr. vacca cow; akin to Skt vasa cow] (1803) 1: matter or a preparation containing the virus of cowpox in a form used for vaccination
2: a preparation of killed microorganisms, living attenuated organisms, or living fully virulent organisms that is administered to produce or artificially increase immunity to a particular disease -- vaccine adj