In vertebrates, the portion of the body between the thorax and pelvis, containing the stomach, intestines, liver, and other organs. In mammals, the abdomen is separated from the thorax by the diaphragm. In arthropods, the last, most posterior segment of the body. abdominal adjective (Äb-dÅm'É-nÉl)
Newcastle, California. Newcastle is an unincorporated community and census-designated place (CDP) in Placer County, California. Newcastle is located 8 miles (12.9 km) northeast of Rocklin. It is nestled in the Sierra Nevada foothills, 31 miles northeast of Sacramento.
Newcastle, Wyoming. Newcastle is a city in and the county seat of Weston County, Wyoming, United States. The population was 3,532 at the 2010 census.