Hygiene refers to practices associate with ensuring good health and cleanliness. Such practices vary widely and what is considered acceptable in one culture may be unacceptable in another. In medical contexts, the term "hygiene" refers to the maintenance of health and healthy living. The term appears in phrases such as personal hygiene, domestic hygiene, dental hygiene, and occupational hygiene and is frequently used in connection with public health. The term "hygiene" is derived from Hygieia, the Greek goddess of health, cleanliness and sanitation. Hygiene is also a science that deals with the promotion and preservation of health. Also called hygienics.