Also known as: sl.
SL has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of SL in Governmental & Military.
A more or less theoretical level based on that which the sea surface would have if there were no tide, swell or wave It.
Governmental & MilitaryA natural or artificial body in orbit around a planet. A secondary planet that revolves around a primary planet Is often, but erroneously, called a 'moon'. Name is sometimes given to the fictitious bodies assumed in the harmonic analysis of tides.
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