Diaphragm—Breathing muscle between chest and abdomen.

Duodenum—The first part of the small intestines.

Dyspepsia—Difficult digestion.

Dysuria—Difficult or painful urination.

Emetic—Medicines which produce vomiting.

Enamel—Covering of the teeth.

Enema—An injection by the rectum.

Enteritis—Inflammation of the intestines.

Epidemic—Generally prevailing.

Epidermis—Outer skin.