Ajwain Seeds (pronounced uj-wine), also known as Carom Seeds or Bishop's Weed, are seed-like fruits used in Indian cuisine as part of a spice blend.

Rigid and dark green in colour when dried, Ajwain Seeds are similar to fennel and cumin seeds in look and similar to thyme in fragrance.

Originally, they were harvested and pressed into ajwain oil to be used in the Indian herbal medicine practice Ayurveda for the treatment of ailments like common colds, post-partum nursing for new mothers, and eventually to aid in digestion when introduced into cooking.