Definition: The word "anaesthetic" is a medical term referring to a chemical agent that gives pain relief or reduces anxiety. It's often used in hospitals, clinics, and dental offices to reduce discomfort during surgeries or procedures. The precise meaning varies depending on context, but it generally includes anesthetics that don't produce long-lasting effects like analgesics do. Examples include buprenorphine (Ketamine) and hydromorphone (Morphine).