Are peppercorns what grind in pepper mill?

Yes, peppercorns are the hard, round seeds of the pepper plant that are ground in pepper mills to produce ground pepper. The peppercorn is the dried fruit of the Piperaceae family, which includes black pepper, white pepper, and green pepper. The peppercorn is composed of a hard outer shell and a soft inner seed. The outer shell of the peppercorn is often black or white, while the inner seed is usually brown or white. The outer shell of the peppercorn is removed before grinding, leaving only the inner seed to be ground. The inner seed of the peppercorn is then ground into a fine powder, which is used to season food.