When there is one sided facial swelling, it simply means that the tissue on the enlarged side is affected. Apart from the tissue, each side of its face has its own blood, nerve and lymphatic supply. Therefore a condition that affects these structures on one side will lead to swelling only on that side.
Full Definition of SEA LEVEL. : the level of the surface of the sea especially at its mean position midway between mean high and low water. See sea level defined for English-language learners.See sea level defined for kids. ADVERTISEMENT. the level of the surface of the sea especially at its mean position midway between mean high and low water.
Metres above sea level is the standard measurement of the elevation or altitude of: 1  a geographic location such as a town, mountain, or other landmark. 2  the elevation of the top of a building or other structure. 3  or the altitude of an airplane or other flying object.etres above sea level is commonly abbreviated mamsl or MAMSL, based on the abbreviation AMSL from above mean sea level. Metres above sea level is sometimes abbreviated as m.a.s.l. or MASL. .