What are the differences between coriander seed and ground coriander, and how do they affect the flavor of dishes?

Coriander seed is the whole seed of the coriander plant, while ground coriander is the powdered form of the seed. Coriander seed has a slightly citrusy and earthy flavor, while ground coriander has a more intense and concentrated taste. Ground coriander is often used in dishes where a stronger flavor is desired, while coriander seed is used for a milder taste and texture.