This document defines several vocabulary words related to reading including: abdomen, which refers to the part of the body containing the stomach and intestines; artificial, which means made by human skill rather than natural; gait, referring to a manner of walking or running; handicapped, meaning having a physical or mental disability; therapist, a person who specializes in treating diseases, injuries, or disorders; and wheelchair, a chair on wheels used especially by people who are sick or cannot walk.