|—n , pl ossa|
|anatomy the technical name for bone|
|[C16: from Latin: bone; compare Greek osteon]|
|—the chemical symbol for|
|2.||Old Style (method of reckoning dates)|
|4.||(in Britain) Ordnance Survey|
|6.||Old Saxon (language)|
os 1 (ŏs)
n. pl. o·ra (ôr'ə)
An opening into a hollow organ or canal.
The oral cavity; mouth.
os 2 (ŏs)
n. pl. os·sa (ŏs'ə)
The symbol for the element osmium.
Latin oculus sinister (left eye)
The symbol for osmium.
Office of Space Science and Applications
mountain massif, nomos (department) of Larissa, eastern Thessaly, Greece. It lies on the Gulf of Thermai and is separated on the north from the Olympus massif by the Vale of Tempe (Tembi). Rising from a broad, steep-sided plateau to a pyramidal peak of 6,489 feet (1,978 m), the mountain is noted in mythology for the attempt of the Aloads, sons of the sea god Poseidon, to climb to heaven by placing Ossa on Olympus and the Pelion mountains on Ossa.
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