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perfluoroalkyl and polyfluoroalkyl substances

(Encyclopedia) perfluoroalkyl and polyfluoroalkyl substances (PFAS), a group of several thousand synthetic organic chemical compounds made up of a chain of carbon atoms bonded to fluorine atoms. PFAS…

Jackson, Shoeless Joe

(Encyclopedia) Jackson, Shoeless Joe (Joseph Jefferson Jackson), 1887–1951, American baseball player, b. Brandon Mills, S.C. Holder of the third highest (.356) career batting average in major league…

Pygmy

(Encyclopedia) Pygmy or PigmyPigmyboth: pĭgˈmē [key], term used for dark-skinned people who live in equatorial rain forests and average less than 59 in. (150 cm) in height. Some studies make a…

Poland China swine

(Encyclopedia) Poland China swine, oldest breed of swine to have originated in the United States and one of the most popular. A number of strains have contributed to the development of this breed,…

Sea Peoples

(Encyclopedia) Sea Peoples, modern term for any of the groups of people who attacked Egypt and the E Mediterranean by sea and sometimes by land c.1200 b.c. They are recorded as having fought in…

dentition

(Encyclopedia) dentition, kind, number, and arrangement of the teeth of humans and other animals. During the course of evolution, teeth were derived from bony body scales similar to the placoid…

Uncle Sam

(Encyclopedia) Uncle Sam, name used to designate the U.S. government. The origins of the term are unclear. The term was believed to have arisen in the War of 1812, when it seems to have been used at…

Gulf War syndrome

(Encyclopedia) Gulf War syndrome, popular name for a variety of ailments experienced by veterans after the Persian Gulf War. Symptoms reported include nausea, cramps, rashes, short-term memory loss,…

music video

(Encyclopedia) music video, videotaped performance of a recorded popular song, usually accompanied by dance or a fragmentary story and sometimes employing concert footage. Typically three to five…