A<unk> is an adjunct used by a person for application to a wound in order to promote healing and/or prevent further harm.   A<unk> is designed to be in direct contact with the wound, which makes it different to a bandage, which is primarily used to hold a<unk> in place.  Some organisations classify them as the same thing (for example, the British Pharmacopoeia) and the terms are used interchangeably by some people. <unk>  are frequently used in first aid and nursing.
Dressing 
Surgical suture
Urination
Mourning
Injection 
Hazmat suit
Transfusion medicine
Infection control