Definition of infectress in US English:

infectress

noun

rare
  • A female who infects a person with disease (especially syphilis).

Origin

Mid 19th century; earliest use found in Edward Pusey (1800–1882), Church of England clergyman and theologian. From infector + -ess: see -tress.

Pronunciation

infectress

/ɪnˈfɛktrɪs/