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phosphorus

(Encyclopedia)phosphorus fŏsˈfərəs [key] [Gr.,=light-bearing], nonmetallic chemical element; symbol P; at. no. 15; at. wt. 30.97376; m.p. 44.1℃; b.p. about 280℃; sp. gr. 1.82 at 20℃; valence −3, +3, or ...

atom

(Encyclopedia)CE5 Bohr-Rutherford atom CE5 Probability distribution of the electron in the hydrogen atom: A. Ground state B. Highly excited state atom [Gr.,=uncuttable (indivisible)], basic unit of matte...

Albigenses

(Encyclopedia)Albigenses ălbĭjĕnˈsēz [key] [Lat.,=people of Albi, one of their centers], religious sect of S France in the Middle Ages. In 1208 the papal legate, a Cistercian, Peter de Castelnau, was murdere...

citizen

(Encyclopedia)citizen, member of a state, native or naturalized, who owes allegiance to the government of the state and is entitled to certain rights. Citizens may be said to enjoy the most privileged form of natio...

Ignatius of Loyola, Saint

(Encyclopedia)Ignatius of Loyola, Saint loiyōˈlə [key], 1491–1556, Spanish churchman, founder of the Jesuits (see Jesus, Society of), b. Loyola Castle near Azpeitia, Gipuzkoa, Spain. In 1539, Ignatius drew u...

Anthropocene

(Encyclopedia)Anthropocene Epoch, an unofficial term used by scientists to describe a period of time—up to the present—in which humanity has impacted the planet on a global scale. The phrase was fir...

caste

(Encyclopedia)caste [Port., casta=basket], ranked groups based on heredity within rigid systems of social stratification, especially those that constitute Hindu India. Some scholars, in fact, deny that true caste s...

Warwick, Richard Neville, earl of

(Encyclopedia)Warwick, Richard Neville, earl of , wŏrˈĭk [key], 1428–71, English nobleman, called the Kingmaker. Through his grandfather, Ralph Neville, 1st earl of Westmorland, he had connections with the hou...

soul

(Encyclopedia)soul, the vital, immaterial, life principle, generally conceived as existing within humans and sometimes within all living things, inanimate objects, and the universe as a whole. Religion and philosop...

tiger

(Encyclopedia)tiger, large carnivore of the cat family, Panthera tigris, found in the forests of Asia. There are six subspecies of P. tigris: Amur or Siberian, Sumatran, Malayan, North Indochinese, Bengal, and Sout...