BILLIARD BALL • DICTIONARY ONE.COM • Definition of Billiard ball

... stockily upheld on a thick neck, and with a good-humored face, which, being clean-shaven, was chiefly notable for the breadth and the squareness of the jaws. He had merry blue eyes, and his crown—he was holding his battered Derby hat in his hand—was as bare as a billiard ball. Below timber-line, as he himself expressed it, he had a brush of close-cut sandy-red hair. I had encountered both of these men when I first came to Morelia, and during two or three weeks I had seen a good deal of them, for we had met daily ...

— The Aztec Treasure-House • Thomas Allibone Janvier