Curtsy

A curtsy (also spelled curtsey or incorrectly as courtsey) is a traditional gendered gesture of greeting, in which a girl or woman bends her knees while bowing her head. In Western culture it is the feminine equivalent of bowing by males. Miss Manners characterizes its knee bend as deriving from a "traditional gesture of an inferior to a superior." The word "curtsy" is a phonological change from "courtesy" known in linguistics as syncope.