a lofty mountain in Thessaly, separated by the vale of Tempe from Mount Olympus, from which the ancients conjectured it had been divided by an earthquake. It is conical in form, with a single summit, rising, according to Dodwell, to a height of 5000 feet. Ossa is lower than Olympus and Pelion, the two mountains with which its name is associated in the fabulous wars of the giants and the gods. Its modern name is Kissovo.