Definition of Rhaeto-Liassic in English:

Rhaeto-Liassic

adjective

Geology
  • Of or relating to the Rhaetic and Liassic stages or series. Also as noun: the series themselves.

Origin

Early 20th century. From classical Latin Rhaetus Rhaetian + -o- + liassic.

Pronunciation

Rhaeto-Liassic

/ˌriːtəʊlʌɪˈasɪk/