Os (?), n.; pl.
Osar (#). [Sw. ås ridge, chain of hills, pl.
åsar.]
(Geol.) One of the ridges of
sand or gravel found in Sweden, etc., supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are
similar to the kames of Scotland and the eschars of Ireland. See Eschar.
||Os , n.; pl.
Ora (#). [L.]
A mouth; an opening; an entrance.
||Os (?), n.; pl.
Ossa (#). [L.]
A bone.
Hear it pronounced