ANNA (Hindustani Ana), an Indian penny, the i6th part of a rupee. The term belongs to the Mohammedan monetary system (see RUPEE). The one-anna coin is of nickel and scalloped; and there are two-anna (nickel) and four-anna (cupro-nickel) pieces. The term anna is frequently used to express a fraction. Thus an Anglo-Indian speaks of two annas of dark blood (an octoroon), a four-anna (quarter) crop, an eight-anna (half) gallop.