GL has various meanings in the Ordnance Survey category. Discover the full forms, definitions, and usage contexts of GL in Ordnance Survey.
Groundwater is the water located beneath the earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water.
Ordnance SurveyA glass is an amorphous solid. The term is usually applied to inorganic solids and not to plastics or other organics. Glasses do not have crystalline internal structure. They usually are hard and brittle solids.
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