Columbia Encyclopedia

Search results

345 results found

mining

(Encyclopedia)mining, extraction of solid mineral resources from the earth. These resources include ores, which contain commercially valuable amounts of metals, such as iron and aluminum; precious stones, such as d...

Roman Catholic Church

(Encyclopedia)Roman Catholic Church, Christian church headed by the pope, the bishop of Rome (see papacy and Peter, Saint). Its commonest title in official use is Holy Catholic and Apostolic Church. “Roman Cathol...

mysticism

(Encyclopedia)mysticism mĭsˈtĭsĭzəm [key] [Gr.,=the practice of those who are initiated into the mysteries], the practice of putting oneself into, and remaining in, direct relation with God, the Absolute, or a...

gamma-ray astronomy

(Encyclopedia)gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic than X rays (see...

Medici, Italian family

(Encyclopedia)Medici mĕˈdĭchē, Ital. māˈdēchē [key], Italian family that directed the destinies of Florence from the 15th cent. until 1737. Of obscure origin, they rose to immense wealth as merchants and ba...

Crusades

(Encyclopedia)CE5 Crusader States (c.1140) Crusades kro͞oˈsādz [key], series of wars undertaken by European Christians between the 11th and 14th cent. to recover the Holy Land from the Muslims. After...

Dynasties of Ancient Egypt (table)

(Encyclopedia)Dynasties of Ancient Egypt Old Kingdom (or Old Empire) First Intermediate Period Middle Kingdom (or Middle Empire) Second Intermediate Period New Kingdom (or New Empire) ...

Gaelic literature

(Encyclopedia)Gaelic literature, literature in the native tongue of Ireland and Scotland. Since Scots Gaelic became separate from Irish Gaelic only in the 17th cent., the literature is conventionally divided into O...

comedy

(Encyclopedia)comedy, literary work that aims primarily to provoke laughter. Unlike tragedy, which seeks to engage profound emotions and sympathies, comedy strives to entertain chiefly through criticism and ridicul...

mystery

(Encyclopedia)mystery or mystery story, literary genre in which the cause (or causes) of a mysterious happening, often a crime, is gradually revealed by the hero or heroine; this is accomplished through a mixture o...