The word "Zanzibar" probably derives from the Persian زنگبار, "Zangi-bar" ("coast of the blacks") and it is also known as Zanji-bar in Arabic. Zanzibar is sometimes referred to as the "Spice Islands," a term that is more often used for the Maluku Islands in Indonesia. Pemba Island is the only island apart from Zanzibar that still produces cloves on a major basis which is the primary source of spice income for the islands.