The term comma has various uses;

• comma is the name used for one of the punctuation symbols: ","
• The term comma is also used in music theory for various small intervals that arise as differences between approximately equal intervals. See musical tuning, Pythagorean comma, Septimal comma , and syntonic comma.
• A Comma is also a type of butterfly, common in the United Kingdom. Other varieties are found in the United States and Canada. It has a white marking on its underwings resembling a comma.