(physical chemistry) the pressure exerted by a solution necessary to prevent osmosis into that solution when it is separated from the pure solvent by a semipermeable membrane
OSM
by means of osmosis
OSM
any fern of the genus Osmunda: large ferns with creeping rhizomes
OSM
New World fern having woolly cinnamon-colored spore-bearing fronds in early spring later surrounded by green fronds
OSM
North American fern having tall erect pinnate fronds and a few sporogenous pinnae at or near the center of the fertile fronds
OSM
large deeply rooted fern of worldwide distribution with upright bipinnate compound tufted fronds
OSM
large family of ferns widely distributed in temperate and tropical areas