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.
This type of anesthesia is generally used for minor surgeries (e.g., breast biopsies, vasectomies) and to stitch small wounds. It is usually administered by injection, which can be painful. However, the discomfort only lasts for a brief moment, and the anesthesia usually takes effect very quickly.