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dating

(Encyclopedia) dating, the determination of the age of an object, of a natural phenomenon, or of a series of events. There are two basic types of dating methods, relative and absolute. In relative…

skepticism

(Encyclopedia) skepticismskepticismskĕpˈtĭsĭzəm [key] [Gr.,=to reflect], philosophic position holding that the possibility of knowledge is limited either because of the limitations of the mind or…

erosion

(Encyclopedia) erosionerosionĭrōˈzhən [key], general term for the processes by which the surface of the earth is constantly being worn away. The principal agents are gravity, running water, near-…

charcoal

(Encyclopedia) charcoal, substance obtained by partial burning or carbonization (destructive distillation) of organic material. It is largely pure carbon. The entry of air during the carbonization…

heredity

(Encyclopedia) heredity, transmission from generation to generation through the process of reproduction in plants and animals of factors which cause the offspring to resemble their parents. That like…

tunicate

(Encyclopedia) tunicatetunicatet&oomacr;ˈnəkĭt [key], marine animal of the phylum Chordata, which also includes the vertebrates. The adult form of most tunicates (also called urochordates) shows…

Strayhorn, Billy

(Encyclopedia) Strayhorn, Billy (William Thomas Strayhorn), 1915–67, African-American jazz composer, arranger, lyricist, and pianist, b. Dayton, Ohio. Classically trained, he was drawn to jazz, and…

batholith

(Encyclopedia) batholith, enormous mass of intrusive igneous rock, that is, rock made of once-molten material that has solidified below the earth's surface (see rock). Batholiths usually are granitic…

Stefansson, Vilhjalmur

(Encyclopedia) Stefansson, VilhjalmurStefansson, Vilhjalmurvĭlˈhyoulmər stĕfˈənsən [key], 1879–1962, Arctic explorer, b. Canada, of Icelandic parents, educated at the Univ. of North Dakota, the State…

Pollock, Sir Frederick

(Encyclopedia) Pollock, Sir FrederickPollock, Sir Frederickpŏlˈək [key], 1845–1937, English jurist, b. London. He was educated at Eton and Cambridge and was admitted to the bar in 1871. He succeeded…