Gradient
noun
A slope or incline.
A rate of inclination or declination of a slope.
Of a function y = f(x) or the graph of such a function, the rate of change of y with respect to x that is, the amount by which y changes for a certain (often unit) change in x equivalently, the inclination to the X axis of the tangent to the curve of the graph.
Synonyms: angular, coefficient, slope, hill, incline, ramp, slope
adjective
Moving by steps; walking.
“gradient automata”
Rising or descending by regular degrees of inclination.
“the gradient line of a railroad”
Adapted for walking, as the feet of certain birds.