Cŏm'mă, n.

[Lat. comma, Gr. κόμμα, segment, clause, from κόπτειν, to cut off.]

1. (Punct.) A character or point (,) marking the smallest division of a sentence in language, either written or printed, and the shortest pause in reading.
2. (Mus.) A small interval, theoretical rather than practical; the difference between a major and minor half-step, represented by some writers as the ninth part of a tone. It is seldom in use, except in the theory of music. Moore.