Gradient

Part of speech: noun (n.)

1. The rate of regular or graded ascent or descent in a road; grade.

2. A part of a road which slopes upward or downward; a portion of a way not level; a grade.

3. The rate of increase or decrease of a variable magnitude, or the curve which represents it; as, a thermometric gradient. Gradient post, a post or stake indicating by its height or by marks on it the grade of a railroad, highway, or embankment, etc., at that spot.

Part of speech: adjective (a.)

1. Moving by steps; walking; as, gradient automata. Wilkins.

2. Rising or descending by regular degrees of inclination; as, the gradient line of a railroad.

3. Adapted for walking, as the feet of certain birsds.