vampiricide noun2 •The act of killing a vampire.He’d nearly been stabbed, and I’d nearly committed vampiricide. That had been the finale in the bustle of our supernaturally busy weeks. — 2009 •A substance used to kill vampire bats.In addition, and related to the increase in extensive cattle raising, the use of vampiricides—substances that are used to kill vampire bats—also has increased. — 2021 formsvampiricides