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color

(Encyclopedia)color, effect produced on the eye and its associated nerves by light waves of different wavelength or frequency. Light transmitted from an object to the eye stimulates the different color cones of the...

Sumatra

(Encyclopedia)Sumatra so͝omäˈtrə [key], island (1990 pop. 36,471,731), c.183,000 sq mi (473,970 sq km), Indonesia, in the Indian Ocean along the equator, S and W of the Malay Peninsula (from which it is separat...

book collecting

(Encyclopedia)book collecting, or bibliophily, the acquiring of books that are, or are expected to become, rare and that possess permanent interest in addition to their texts. Collecting has traditionally concentra...

stained glass

(Encyclopedia)stained glass, in general, windows made of colored glass. To a large extent, the name is a misnomer, for staining is only one of the methods of coloring employed, and the best medieval glass made litt...

psychopharmacology

(Encyclopedia)psychopharmacology sīˌkōfärˌməkŏlˈəjē [key], in its broadest sense, the study of all pharmacological agents that affect mental and emotional functions. The term is usually applied more speci...

insect

(Encyclopedia)CE5 External anatomy of a female grasshopper, representative of the class Insecta insect, invertebrate animal of the class Insecta of the phylum Arthropoda. Like other arthropods, an insect has a ...

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...

imperialism

(Encyclopedia)imperialism, broadly, the extension of rule or influence by one government, nation, or society over another. Imperialism was reborn in the West with the emergence of the modern nation-state and the ...

fur trade

(Encyclopedia)fur trade, in American history. Trade in animal skins and pelts had gone on since antiquity, but reached its height in the wilderness of North America from the 17th to the early 19th cent. The demand ...

meteorology

(Encyclopedia)meteorology, branch of science that deals with the atmosphere of a planet, particularly that of the earth, the most important application of which is the analysis and prediction of weather. Individual...