Rhaetia

[ ree-shee-uh, -shuh ]
/ ˈri ʃi ə, -ʃə /

noun

an ancient Roman province in central Europe, comprising what is now E Switzerland and a part of the Tyrol: later extended to the Danube.
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British Dictionary definitions for rhaetia

Rhaetia

/ (ˈriːʃɪə) /

noun

an Alpine province of ancient Rome including parts of present-day Tyrol and E Switzerland
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012