1) Eskers 2) Geologic mounds 3) Glacial gravel ridges 4) Glacial ridge 5) Glacial ridges 6) Gravel ridges 7) Lengthy eskers 8) Mountain ridges 9) Narrow mountain ridges 10) Ridges between ice walls 11) Ridges of glacial sand 12) The heaviest metal known 13) The left eye 14) Wilde one 
• (n. pl.) See 3d Os. • (pl. ) of Os
O'sar noun plural (Geol.) See 3d Os .