Medical Definition of gradient
1: change in the value of a quantity (as temperature, pressure, or concentration) with change in a given variable and especially per unit on a linear scale
2: a graded difference in physiological activity along an axis (as of the body or an embryonic field)
3 usually gradient of effect : change in response with distance from the stimulus
Seen and Heard
What made you want to look up gradient? Please tell us where you read or heard it (including the quote, if possible).