Definition of Marnian in US English:

Marnian

adjective

Archaeology
  • Of, relating to, or designating a regional group of the La Tène Iron Age culture which flourished in the valley of the Marne in northern France.

Origin

Early 20th century. From the name of the River Marne, in northern France + -ian.

Pronunciation

Marnian

/ˈmɑːnɪən/