comma comma /ˈkɑːmə/

noun

1. Anglewing butterfly with a comma-shaped mark on the underside of each hind wing  ( comma , comma butterfly , Polygonia comma )
   anglewing butterfly with a comma-shaped mark on the underside of each hind wing
   
   
2. A punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence  ( comma )
   a punctuation mark (,) used to indicate the separation of elements within the grammatical structure of a sentence