A character or point (,) marking the smallest divisions of a sentence, written or printed.
2.
(Mus.) A small interval (the difference between a major and minor half step), seldom used except by tuners.
Comma bacillus (Physiol.), a variety of bacillus shaped like a comma, found in the intestines of patients suffering from cholera. It is considered by some as having a special relation to the disease; called also cholera bacillus.
Comma butterfly (Zool.), an American butterfly (Grapta comma), having a white comma-shaped marking on the under side of the wings.
