Columbia Encyclopedia

Search results

500 results found

beryl

(Encyclopedia)beryl bĕrˈĭl [key], mineral, a silicate of beryllium and aluminum, Be3Al2Si6O18, extremely hard, occurring in hexagonal crystals that may be of enormous size and are usually white, yellow, green, b...

bore

(Encyclopedia)bore, inrush of water that advances upstream with a wavelike front, caused by the progress of incoming tide from a wide-mouthed bay into its narrower portion. The tidal movement tends to be retarded b...

Murdoch, Dame Iris

(Encyclopedia)Murdoch, Dame Iris (Dame Jean Iris Murdoch) mûrˈdŏk [key], 1919–99, British novelist and philosopher, b. Dublin, Ireland, grad. Oxford (1942). In 1948 she was named lecturer in philosophy at Oxfo...

Serra, Saint Junípero

(Encyclopedia)Serra, Saint Junípero ho͞onēˈpārō sĕˈrä [key], 1713–84, Spanish Franciscan missionary in North America, b. Majorca. His name was originally Miguel José Serra, and Junípero was his name in...

De Long, George Washington

(Encyclopedia)De Long, George Washington də lôngˈ [key], 1844–81, American arctic explorer, b. New York City, grad. Annapolis, 1865. In 1873 he was assigned to the Juniata, which was sent to the arctic to sear...

Le Châtelier's principle

(Encyclopedia)Le Châtelier's principle, chemical principle that states that if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and concentration of components...

testosterone

(Encyclopedia)CE5 testosterone tĕstŏsˈtərōn [key], principal androgen, or male sex hormone. One of the group of compounds known as anabolic steroids, testosterone is secreted by the testes (see testis) but ...

cold fusion

(Encyclopedia)cold fusion or low-temperature fusion, nuclear fusion of deuterium, an isotope of hydrogen, at or relatively near room temperature. Fusion, the reaction involved in the release of the destructive ener...

aging

(Encyclopedia)aging, in biology, cumulative changes in an organism, organ, tissue, or cell leading to a decrease in functional capacity. In humans, aging is associated with degenerative changes in the skin, bones, ...

German language

(Encyclopedia)German language, member of the West Germanic group of the Germanic subfamily of the Indo-European family of languages (see Germanic languages). It is the official language of Germany and Austria and i...