Contour

kon′tōōr, or kon-tōōr′, n. the outline: the line which bounds the figure of any object.— v.t. to mark with contour lines.— Contour lines , lines drawn in a map through points all at the same height above sea-level—usually on the British Ordnance Survey maps at intervals of 50 feet. [Fr. con , and tour , a turning—L. torn us —Gr. tornos , a lathe.]