Also known as: std.
STD has various meanings in the Atmosphere category. Discover the full forms, definitions, and usage contexts of STD in Atmosphere.
Saltness. The amount of dissolved salt in water. Usually expressed as a ratio as compared with fresh water fresh water being 1000 and sea water about 1026 but varying, in ports and harbours, between 1000 and 1031 (Port Said). Also known as the specific gravity of sea water.
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