What is "commas"

Usage examples of "commas".

If the series is in pairs, commas separate the pairs: "Rich and poor, learned and unlearned, black and white, Christian and Jew, Mohammedan and Buddhist must pass through the same gate.

Two commas crossed, an S reversed, an hourglass on its side and pushed inward from the ends, and a crooked pi.

Corbell dialed a number he remembered: two commas crossed, S reversed, hourglass on its side, crooked pi.