• Gradient
  Gradient
  In vector calculus, the gradient of a scalar field is a vector field that points in the direction of the greatest rate of increase of the scalar field, and whose magnitude is the greatest rate of change....
  
  , in vector calculus, a vector field representing the maximum rate of increase of the scalar field direction of the maximum change.
• Slope
  Slope
  In mathematics, the slope or gradient of a line describes its steepness, incline, or grade. A higher slope value indicates a steeper incline....
  
   or grade, referring to the inclination of a road or other geographic features
• Image gradient
  Image gradient
  An image gradient is a directional change in the intensity or color in an image. Image gradients may be used to extract information from images....
  
  , a gradual change or blending of color
  • Color gradient
    Color gradient
    In computer graphics, a color gradient specifies a range of position-dependent colors, usually used to fill a region. For example, many window managers allow the screen background to be specified as a gradient...
    
    
• Texture gradient
  Texture gradient
  Texture gradient is the distortion in size which closer objects have compared to objects farther away. It also involves groups of objects appearing denser as they move farther away...
  
  

Biology

• Concentration gradient
  Diffusion
  Molecular diffusion, often called simply diffusion, is the thermal motion of all particles at temperatures above absolute zero. The rate of this movement is a function of temperature, viscosity of the fluid and the size of the particles...
  
  , the ratio of solute concentration between two adjoining regions
• Potential gradient
  Potential gradient
  A potential gradient is the local space rate of change of the potential with respect to displacement.In electrostatics then, it is the local space rate of change of the electric potential:Units are volts per meter...
  
  , the difference in electric charge between two adjoining regions

Fluid dynamics and earth science

• Density gradient
  Density Gradient
  Density gradient is a spatial variation in density over an area. The term is used in the natural sciences to describe varying density of matter, but can apply to any quantity whose density can be measured...
  
  
• Pressure gradient
  Pressure gradient
  In atmospheric sciences , the pressure gradient is a physical quantity that describes in which direction and at what rate the pressure changes the most rapidly around a particular location. The pressure gradient is a dimensional quantity expressed in units of pressure per unit length...
  
  
• Temperature gradient
  Temperature gradient
  A temperature gradient is a physical quantity that describes in which direction and at what rate the temperature changes the most rapidly around a particular location. The temperature gradient is a dimensional quantity expressed in units of degrees per unit length...
  
  
  • Geothermal gradient
    Geothermal gradient
    Geothermal gradient is the rate of increasing temperature with respect to increasing depth in the Earth's interior. Away from tectonic plate boundaries, it is 25–30°C per km of depth in most of the world. Strictly speaking, geo-thermal necessarily refers to the Earth but the concept may be applied...
    
    
  • Sound speed gradient
    Sound speed gradient
    In acoustics, the sound speed gradient is the rate of change of the speed of sound with distance, for example with depth in the ocean,or height in the Earth's atmosphere. A sound speed gradient leads to refraction of sound wavefronts in the direction of lower sound speed, causing the sound rays to...
    
    
• Wind gradient
  Wind gradient
  In common usage, wind gradient, more specifically wind speed gradientor wind velocity gradient,or alternatively shear wind,...