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.
A geodetic datum or geodetic system is a coordinate system, and a set of reference points, used to locate places on the Earth (or similar objects). An approximate definition of sea level is the datum WGS 84, an ellipsoid, whereas a more accurate definition is Earth Gravitational Model 2008 (EGM2008), using at least 2,159 spherical harmonics.