Definition of menstruant in US English:

menstruant

adjective

rare
  • Subject to menstruation; menstruating.

noun

rare
  • A menstruating woman.

Origin

Mid 17th century; earliest use found in Thomas Browne (1605–1682), physician and author. From menstruum + -ant, in 17th-cent. use perhaps after post-classical Latin menstruant-, menstruans menstruating.

Pronunciation

menstruant

/ˈmɛnstrʊənt/