| os | by means of osmosis |
|---|---|
| os | any fern of the genus Osmunda: large ferns with creeping rhizomes |
| os | New World fern having woolly cinnamon-colored spore-bearing fronds in early spring later surrounded by green fronds |
| os | North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile fronds |
| os | large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds |
| os | large family of ferns widely distributed in temperate and tropical areas |
| os | large harmless hawk found worldwide that feeds on fish and builds a bulky nest often occupied for years |
| os | composed of or containing bone |
| os | cavity in the petrous part of the temporal bone that contains the membranous labyrinth |
| os | the porous calcified substance from which bones are made |
| os | a northeastern Iranian language spoken in Russia |
| os | a small bone |