- comma - a punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence
--1 is a kind of punctuation, punctuation mark
- comma, comma butterfly, Polygonia comma - anglewing butterfly with a comma-shaped mark on the underside of each hind wing
--2 is a kind of nymphalid, nymphalid butterfly, brush-footed butterfly, four-footed butterfly
--2 is a member of Polygonia, genus Polygonia - comma, comma butterfly, Polygonia comma - anglewing butterfly with a comma-shaped mark on the underside of each hind wing