Stepper

n. person or animal that steps; dancer (Informal)

A stepper is a device used in the manufacture of integrated circuits (ICs) that is similar in operation to a slide projector or a photographic enlarger. Steppers are an essential part of the complex process, called photolithography, that creates millions of microscopic circuit elements on the surface of tiny chips of silicon. These chips form the heart of ICs such as computer processors, memory chips, and many other devices.
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Noun
1. a professional dancer
(synonym) hoofer
(hypernym) dancer, professional dancer
2. a motor (especially an electric motor) that moves or rotates in small discrete steps
(synonym) stepping motor
(hypernym) motor
3. a horse trained to lift its feet high off the ground while walking or trotting
(synonym) high stepper
(hypernym) horse, Equus caballus

(n.)
One who, or that which, steps; as, a quick stepper.
  

see Step and Repeat