adjective, sourer, sourest. 1. having an acid taste, resembling that of vinegar, lemon juice, etc.; tart. 2. rendered acid or affected by fermentation; fermented. 3. producing the one of the four basic taste sensations that is not bitter, salt, or sweet. 4. characteristic of something fermented: a sour smell.
General anesthetics normally are used to produce loss of consciousness before and during surgery. However, for obstetrics (labor and delivery) or certain minor procedures, an anesthetic may be given in small amounts to relieve anxiety or pain without causing unconsciousness.
1 General anesthesia drugs such as midazolam, ketamine, propofol and fentanyl are used to put a person in a twilight sleep or render them completely unconscious and unaware of pain. 2  Dentists who have completed a training program in anesthesiology may also administer general IV and inhalation anesthetic agents.