Definition of metacercaria in US English:

metacercaria

noun

Zoology
  • The encysted final larval form of a trematode (parasitic worm), into which a cercaria develops prior to assuming the adult form in the definitive host.

Origin

1920s; earliest use found in American Naturalist. From meta- + Cercaria, after French métacercaire.

Pronunciation

metacercaria

/ˌmɛtəsəːˈkɛːrɪə/