The term 'Unit of Dry Measure' refers to a unit of measurement used to measure dry goods such as grains, fruits, and vegetables. The most common units of dry measure are the PECK (4 letters), ardeb (5 letters), and BUSHEL (6 letters). A PECK is equal to 8 dry quarts or 2 dry gallons, an ardeb is equal to 60 dry quarts, and a BUSHEL is equal to 4 pecks or 32 dry quarts. All three of these units of dry measure are commonly used in the United States and other parts of the world.