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.
altitude, height-elevation especially above sea level or above the earth's surface; the altitude gave her a headache. ground level, grade-the height of the ground on which something stands; the base of the tower was below grade. water level-the level of the surface of a body of water.. the height to which something is elevated or to which it rises. 3. the altitude of a place above sea level or ground level. 4. an elevated place; eminence. 5. a drawing that represents a building or other object as being projected geometrically on a vertical plane parallel to one of its sides.