PAR has various meanings in the Ordnance Survey category. Discover the full forms, definitions, and usage contexts of PAR in Ordnance Survey.
PH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline.
Ordnance SurveyA wall that subdivides spaces within any story of a building or room. The portion of a vertical wall of a building which extends above the roof line at the intersection of the wall and roof. A wall placed at the edge of a roof to prevent people from falling off. Or A low wall, located at the top of any sudden drop, such as at the top of the facade of a building. A low wall built along the edge of a roof bridge or other structure; the continuation of the main wall above the eaves level to form such a wall.
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