Ajwain (Carum copticum), also called bishop’s weed , is a herb that is used as a spice and a major ingredient in different types of medicines. It is thought to have originated in Egypt and the eastern Mediterranean region. Ajwain (Yavani) belongs to the Apiaceae or the Carrot family and its botanical name is Trachyspermum Ammi. Here we are explaining its uses, benefits, dosage and properties. Ajwain in English: Ajwain, a common spice in every Indian kitchen, is known in English as Carom Seeds . Some people also call it Bishop’s Weed. This small seed has a strong aroma, a slightly... AJWAIN definition: 1. a seed that is used as a spice, especially in South Asian cooking: 2. a seed that is used as a…. Learn more.