The term 'Cupid's bow' is particularly used in reference to which part of the human anatomy?

A Cupid’s bow is the name of a lip shape where the upper lip comes to two distinct points toward the center of the mouth, almost like a letter ‘M’. These points are usually directly in line with the philtrum, otherwise known as the grooved space between the nose and mouth.

A Cupid’s bow mouth resembles the double-curved bow often seen carried by the Roman god, Cupid. Some people have more pronounced Cupid’s bows than others, and some don’t have one at all.

A Cupid’s bow gives the lips a heart shape, which may be how it got its name. Some upper lips are uniform in shape, and others dip down in the middle, revealing two distinct peaks of the upper lip. The latter is known as a Cupid’s bow.