a cask whose content is one third of a pipe; that is, forty-two wine gallons; also, a liquid measure of forty-two wine, or thirty-five imperial, gallons.-a cask larger than a barrel, and smaller than a hogshead or a puncheon, in which salt provisions, rice, etc., are packed for shipment.-the third tone of the scale. see mediant.-a sequence of three playing cards of the same suit. tierce of ace, king, queen, is called tierce-major.-a position in thrusting or parrying in which the wrist and nails are turned downward.-the third hour of the day, or nine a. m,; one of the canonical hours; also, the service appointed for that hour.-divided into three equal parts of three different tinctures; -- said of an escutcheon.