Rhaetic
/ˈriːtɪk/(also Rhetic, Raetic)
adjective
1Of or relating to the ancient Roman province of Rhaetia or the region of the Alps corresponding to this; = Rhaetian.
2Of the ancient Rhaetic language; = Rhaetian.
3 Geology = Rhaetian.
noun
1 Geology = Rhaetian. Also (chiefly in plural): rocks or strata of the Rhaetian stage (now rare ).
2Frequently in form Raetic. The ancient language spoken in the Roman province of Rhaetia; = Rhaetian.
Origin
Early 17th century. From French rhétique and its etymon classical Latin Rhaeticus (also Raeticus) from Rhaetia + -icus.