Vaccine
Pronunciation : Vac"cine
Part of Speech : a.
Etymology : [L. vaccinus, fr. vacca a cow; cf. Skr. vac to bellow, to groan.]
Definition : Defn: Of or pertaining to cows; pertaining to, derived from, or caused by, vaccinia; as, vaccine virus; the vaccine disease. -- n.
Defn: The virus of vaccinia used in vaccination.
Source : Webster's Unabridged Dictionary, 1913