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Mortimer, Edmund de, 3d earl of March and 1st earl of Ulster

(Encyclopedia)Mortimer, Edmund de, 3d earl of March and 1st earl of Ulster də môrˈtĭmər [key], 1351–81, English nobleman. He succeeded (1360) his father, Roger, 2d earl of March, married (1368) Philippa, dau...

Mortimer, Edmund de, 5th earl of March and 3d earl of Ulster

(Encyclopedia)Mortimer, Edmund de, 5th earl of March and 3d earl of Ulster, 1391–1425, English nobleman, son of Roger de Mortimer, 4th earl of March. He succeeded (1398) his father not only as earl of March and U...

Chadwick, Henry, Anglo-American journalist and popularizer of baseball

(Encyclopedia)Chadwick, Henry, 1824–1908, Anglo-American journalist who helped popularize baseball in the United States, b. Exeter, England. Moving to Brooklyn, N.Y., with his family in 1837, he was a cricket rep...

Mortimer, Roger de, 4th earl of March and 2d earl of Ulster

(Encyclopedia)Mortimer, Roger de, 4th earl of March and 2d earl of Ulster, 1374–98, English nobleman. He succeeded (1381) his father, Edmund de Mortimer, 3d earl of March, and was brought up as a royal ward. In 1...

Bohun, Humphrey V de, 2d earl of Hereford and 1st earl of Essex

(Encyclopedia)Bohun, Humphrey V de, 2d earl of Hereford and 1st earl of Essex, d. 1275, English nobleman; son of Henry de Bohun, 1st earl of Hereford. A member of the household of Henry III, he inherited the earldo...

cold fusion

(Encyclopedia)cold fusion or low-temperature fusion, nuclear fusion of deuterium, an isotope of hydrogen, at or relatively near room temperature. Fusion, the reaction involved in the release of the destructive ener...

adenosine triphosphate

(Encyclopedia)CE5 Adenosine triphosphate (ATP) adenosine triphosphate (ATP) ədĕnˈəsēn trīˌfŏsˈfāt [key], organic compound composed of adenine, the sugar ribose, and three phosphate groups. ATP serves ...

Fermi-Dirac statistics

(Encyclopedia)Fermi-Dirac statistics, class of statistics that applies to particles called fermions. Fermions have half-integral values of the quantum mechanical property called spin and are “antisocial” in the...

Abel, son of Adam and Eve, in the Bible

(Encyclopedia)Abel, in the Bible, son of Adam and Eve, a shepherd, killed by his older brother, Cain; in the Gospel of St. Matthew, mentioned as the first martyr. ...

Friedman, Jerome Isaac

(Encyclopedia)Friedman, Jerome Isaac frēdˈmən [key], 1930–, American physicist, b. Chicago, Ph.D. Univ. of Chicago, 1956. A professor at the Massachusetts Institute of Technology, Friedman won the 1990 Nobel P...