The difference in elevation represented by the space between adjacent contour lines

(cartography) A map made to show the relief measurements of the land by means of contour lines.

plural of contour feather

(ornithology) Any feather possessing a central shaft (rachis), usually with vanes composed of barbs.

plural of contour line

(phonetics) A tone whose pitch changes during the syllable.

(mathematics) The integral of a function around a contour on the complex plane.

plural of contour map

plural of contour integral

plural of contour interval