os

os¹

/os/, n., pl. ossa /os"euh/.

Anat., Zool. a bone.

[1540-50; < L]

os²

/os/, n., pl. ora /awr"euh, ohr"euh/.

Anat., Zool. a mouth or orifice of the body.

[1730-40; < L os mouth]

os³

/ohs/, n., pl. osar /oh"sahr/.

Geol. an esker, esp. when of great length.

[ < Sw ås (pl. åsar) ridge]

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