Entry 1 sense Webster, 1913 Baryta /bə-rī'-tə/ · Ba·ry·ta · IPA /bəˈɹaɪ.tə/ 01 n. An oxide of barium (or barytum); a heavy earth with a specific gravity above 4. 1. An oxide of barium (or barytum); a heavy earth with a specific gravity above 4.(Chem.)