Celery seed is a spice made from the dried seeds of the celery plant. It has a strong and pungent flavor with a slightly bitter and earthy taste, similar to fresh celery but more concentrated. Celery seed is a versatile ingredient used in many cuisines around the world, particularly in American, European, and Indian dishes. It is often used as a seasoning for salads, dressings, and marinades, as well as in soups, stews, and pickling recipes.