|Flowers of Trachyspermum ammi|
Ajwain, ajowan (//), or Trachyspermum ammi—also known as ajowan caraway, thymol seeds, bishop's weed, or carom—is an annual herb in the family Apiaceae (or Umbelliferae). Both the leaves and the seed‑like fruit (often mistakenly called seeds) of the plant are consumed by humans. The name "bishop's weed" also is a common name for other plants. The "seed" (i.e., the fruit) is often confused with lovage "seed".