Definition of mastax in US English:

mastax

noun

Zoology
  • The muscular pharynx of a rotifer, containing the masticatory jaws.

Origin

Mid 19th century; earliest use found in Philip Gosse (1810–1888), zoologist and religious writer. From ancient Greek μάσταξ mouth, jaws from the base of μασᾶσθαι to chew.

Pronunciation

mastax

/ˈmastaks/