Definitions for "Isosurfaces"
(n) A surface in 3-D space that defines constant values of a dependent variable. Isosurfaces are the logical extension of contour lines (isolines), which map constant values in 2-D space. Every point on an isosurface identifies the location where three independent variable values result in the dependent variable value of interest. Like isolines, multiple isosurfaces can be used to map different dependent variable values.