Celery seed oil is an essential oil derived from the seeds of the celery plant, scientifically known as Apium graveolens. Celery is a biennial plant that belongs to the Apiaceae family and is widely cultivated for its edible stalks and flavorful seeds. The oil is extracted from the small, brown seeds through a steam distillation process resulting in a pale yellow to amber-colored liquid with a strong, spicy, and somewhat earthy aroma.