Search

Search results

Displaying 211 - 220

rattlesnake

(Encyclopedia) rattlesnake, poisonous New World snake of the pit viper family, distinguished by a rattle at the end of the tail. The head is triangular, being widened at the base. The rattle is a…

baby boom

(Encyclopedia) baby boom, a period in which the birthrate is significantly higher than in other periods, especially the post–World War II period in the United States, Canada, Australia, and New…

Alexander III, czar of Russia

(Encyclopedia) Alexander III, 1845–94, czar of Russia (1881–94), son and successor of Alexander II. Factors that contributed to Alexander's reactionary policies included his father's assassination,…

William of Occam

(Encyclopedia) William of Occam or OckhamWilliam of Occam or Ockhamboth: ŏkˈəm [key], c.1285–c.1349, English scholastic philosopher. A Franciscan, Occam studied and taught at Oxford from c.1310 until…

solution

(Encyclopedia) CE5 Solubility curves solution, in chemistry, homogeneous mixture of two or more substances. The dissolving medium is called the solvent, and the dissolved material is called the…

Nkrumah, Kwame

(Encyclopedia) Nkrumah, Kwame Nkrumah, Kwame kwäˈmā nkr&oomacr;ˈmä [key], 1909–72, African political leader, prime…

siege

(Encyclopedia) siege, assault against a city or fortress with the purpose of capturing it. The history of siegecraft parallels the development of fortification and, later, artillery. In early times…

Phillips, Wendell

(Encyclopedia) Phillips, Wendell, 1811–84, American reformer and orator, b. Boston, grad. Harvard (B.A., 1831; LL.B., 1834). He was admitted to the bar in 1834 but, having sufficient income of his…

polymerase chain reaction

(Encyclopedia) polymerase chain reactionpolymerase chain reactionpŏlˈĭmərāsˌ [key] (PCR), laboratory process in which a particular DNA segment from a mixture of DNA chains is rapidly replicated,…

Continental System

(Encyclopedia) Continental System, scheme of action adopted by Napoleon I in his economic warfare with England from 1806 to 1812. Economic warfare had been carried on before 1806, but the system…