Corset
A corset is a garment worn to hold and train the torso into a desired shape for aesthetic or medical purposes (either for the duration of wearing it or with a more lasting effect). Both men and women are known to wear corsets, though women more commonly do.
In recent years, the fashion industry has also borrowed the term "corset" to refer to tops which, to varying degrees, mimic the look of traditional corsets without actually acting as them. While these modern corsets and corset tops often feature lacing or boning and generally imitate a historical style of corsets, they have very little, if any, effect on the shape of the wearer's body. Genuine corsets are usually made by a corsetmaker and are frequently fitted to the individual wearer.
Etymology
The word corset is derived from the Old French word corps and the diminutive of body, which itself derives from corpus—Latin for body. The craft of corset construction is known as corsetry, as is the general wearing of them. (The word corsetry is sometimes also used as a collective plural form of corset.) Someone who makes corsets is a corsetier or corsetière (French terms for a man and for a woman, respectively), or sometimes simply a corsetmaker.