Definition of "quarter-circle" []

• A piece of gymnasium apparatus consisting of a long strip of board bent into a quarter-circle, with straps for the feet at the bottom and pulleys for the hands at the top, designed for various exercises, particularly those calling upon the abdominal muscles. (noun)

The Century Dictionary (Public Domain)

• "Its quarter-circle cutouts were later replaced with corners by order of the state for the installation of a traffic light."
• "Roll out the quarter-circle of pastry to a circle big enough to make a lid."
• "So next month, Tuscarorans are preparing once again to get out their extension cords, array their stereos in a quarter-circle and tune them to rock station KHIX, full blast, from dawn to dusk."