Ajwain is a member of the umbelliferae family. It includes dill caraway and cumin. Mostly found in Indian cooking as a spice. It is also known as bishopâs weed or carom. It is found in the state ofujarat in India. Ajwain is an herb which has a sharp smell and taste. It is non irrigated crop. They are mostly used as whole form and rarely used as powder. It is used in small amount. It is used as a part of tadka for many dishes. Its seeds are much valued as a medicine due to its digestive and healing properties. Ajwain seeds contain an essential oil. It is about 50% thymol which is aermicide used in toothpaste and perfumery. It is used as household remedy for indigestion. Other names: Ajowan ajvain ajwan omum.