A spice is a seed, fruit, root, bark, berry, bud or vegetable substance primarily used for flavoring, coloring or preserving food.
In general use, herbs are any plants used for food, flavoring, medicine, or perfume. Culinary use typically distinguishes herbs from spices.
Vegetable that has been dehydrated or dried in order to extend the shelf life and to concentrate the flavor. Popular dried vegetables include onions & garlic.
The wide array of curry powders used across the world on a day to day basis trace their history to India.