Stereotactic refers to a technique that involves using three-dimensional coordinates to locate specific points in space. This method is commonly used in surgery, radiation therapy and other medical procedures where precision is crucial. The term comes from the Greek words “stereo” meaning "solid" or "three-dimensional," and "tactic" meaning "art." In stereotaxy, a coordinate system is used to identify a specific target within the body, allowing for accurate placement of instruments or radiation beams.