Cupid's bow
The double curve of the upper lip, shaped like the bow of the Roman god Cupid.
The Cupid's bow is the double curve in the middle of the upper lip. Its two peaks sit at the bottom of the philtral columns, the ridges that run down from the nose. Some bows are sharp and high, some soft and nearly flat. Makeup artists outline it with lip liner, and in the 1920s and 1930s film actresses painted it into a small, pointed shape. It forms before birth as the parts of the upper lip join.