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nitrogen

(Encyclopedia)nitrogen nīˈtrəjən [key], gaseous chemical element; symbol N; at. no. 7; interval in which at. wt. ranges 14.00643–14.00728; m.p. −209.86℃; b.p. −195.8℃; density 1.25 grams per liter at ...

band

(Encyclopedia)band, in music, a group of musicians playing principally on wind and percussion instruments, usually outdoors. Prior to the 18th cent., the term band was frequently applied in a generic sense to cover...

economics

(Encyclopedia)economics, study of how human beings allocate scarce resources to produce various commodities and how those commodities are distributed for consumption among the people in society (see distribution). ...

socialism

(Encyclopedia)socialism, general term for the political and economic theory that advocates a system of collective or government ownership and management of the means of production and distribution of goods. Because...

Einstein, Albert

(Encyclopedia)Einstein, Albert īnˈstīn [key], 1879–1955, American theoretical physicist, known for the formulation of the relativity theory, b. Ulm, Germany. He is recognized as one of the greatest physicists ...

ammonia

(Encyclopedia)ammonia, chemical compound, NH3, colorless gas that is about one half as dense as air at ordinary temperatures and pressures. It has a characteristic pungent, penetrating odor. Ammonia forms a minute ...

Bach, Johann Sebastian

(Encyclopedia)Bach, Johann Sebastian bäkh [key], 1685–1750, German composer and organist, b. Eisenach; one of the greatest and most influential composers of the Western world. He brought polyphonic baroque musi...

vocational education

(Encyclopedia)vocational education, training designed to advance individuals' general proficiency, especially in relation to their present or future occupations. The term does not normally include training for the ...

theology

(Encyclopedia)theology thēŏlˈəjē [key], in Christianity, the systematic study of the nature of God and God's relationship with humanity and with the world. Although other religions may be said to have theologi...

linguistics

(Encyclopedia)linguistics, scientific study of language, covering the structure (morphology and syntax; see grammar), sounds (phonology), and meaning (semantics), as well as the history of the relations of language...