Celery seeds are the minute seed-like fruits of the celery plant (Apium graveolens). They are harvested, dried and used as a condiment or spice.
The so called seeds are technically, a fruit called a schizocarp. They closely resemble the seeds of Ajwain (Carom Seeds) that are also used as a spice but have a much stronger flavour and aroma.
How are Celery Seeds Used?
Celery seeds can be used whole or ground as flavouring or spice.
They can also be ground and mixed with salt and used as celery salt.
The essential oil extracted from the celery seeds is a major flavouring agent in the food industry used to improve the taste and aroma of prepared foods, soups, meats, sauces,
pickles, and vegetable juices ( Scholar-works)