combining form of L. vacca cow, as in Vaccicide, the killing of a cow; Vaccimulgence, milking of cows.
Also, in recent Dicts., vaccigenous (for *vaccinigenous) adj., producing vaccine.
1796. Coleridge, Biog. Lit. (1845), II. 381. Will you try to look out for a fit servant for us, scientific in vaccimulgence? That last word is a new one.
1868. E. C. Seaton, Handbk. Vaccination, 25, note. The vaccigenous complaint in the horse, from the singularity of making the hair erect, was called a scratchy heel.
1900. Mary Carus-Wilson, Irene Petrie, xi. 249. In Kashmir vaccicide is a capital crime.