This document defines and provides examples for several medical prefixes: Ortho refers to straight or erect, such as orthodontics for straightening teeth; Mater relates to mother or maternity, like wearing maternity clothes while pregnant; Micro means small, as seen with microscopes viewing small things; Path is about suffering or feelings, as in the clear pathway for Johnny; and Manu concerns the hand or work done by hand, like a manual instructing machine operation.