comma

Concise Oxford English Dictionary © 2008 Oxford University Press:
comma/ˈkɒmə/

▶noun

• 1 a punctuation mark (,) indicating a pause between parts of a sentence or separating items in a list.

• 2 Music a minute interval or difference of pitch.

• 3 a widespread butterfly that has orange and brown wings and a white comma-shaped mark on the underside of the hindwing. [Polygonia c-album.]

– origin C16: via L. from Gk komma ‘piece cut off, short clause’, from koptein ‘cut’.