Carom seeds, commonly known as ajwain, are the small, seed-like fruits of the plant Trachyspermum ammi, belonging to the Apiaceae family, which also includes cumin, fennel, and parsley. Despite their resemblance to seeds, they are technically fruits. Ajwain is widely used in Indian, Middle Eastern, and North African cuisines for its distinctive flavor and potential health benefits.

Ajwain seeds are small, oval, and ridged, typically light brown to olive green in color. They possess a strong, pungent aroma similar to thyme, due to the presence of thymol, a compound responsible for their characteristic scent and taste. The flavor is intense, with bitter and spicy notes reminiscent of oregano and anise.