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
One of the five low partials of a bell, usually about a minor third above the prime Often the loudest partial, it contributes to a bell's timbre but does not affect its pitch
one of three equal parts of a divisible whole; "it contains approximately a third of the minimum daily requirement"