putrefacient
/ˌpjuːtrɪˈfeɪʃnt/noun
An agent or substance that causes putrefaction. rare.
adjective
= putrefactive. Now rare.
Origin
Mid 18th century; earliest use found in Robert James (d. 1776), physician and inventor of James's fever powder. From classical Latin putrefacient-, putrefaciēns, present participle of putrefacere.