A cam is a rotating, oscillating, or reciprocating machine element that has a surface or groove formed to impart special or irregular motion to a second part called a ____________________.

Reciprocating Machine Element

A component of machinery that moves back and forth or up and down, typically converting rotary motion into linear motion or vice-versa.

Rotating

Refers to an object or part that moves in a circle around an axis or point, commonly seen in machinery and mechanical devices.

Oscillating

Moving or swinging back and forth at a regular speed.