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concrete

(Encyclopedia) concrete, structural masonry material made by mixing broken stone or gravel with sand, cement, and water and allowing the mixture to harden into a solid mass. The cement is the…

concretion

(Encyclopedia) concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the…

Albizu Campos, Pedro

(Encyclopedia) Albizu Campos, PedroAlbizu Campos, Pedropāˈdrō älbēˈs&oomacr; kämˈpōs [key], 1891–1965, Puerto Rican political leader. After service in an African-American unit during World War I…

Condé, French family

(Encyclopedia) CondéCondékôNdāˈ [key], family name of a cadet branch of the French royal house of Bourbon. The name was first borne by Louis I de Bourbon, prince de Condé, 1530–69, Protestant leader…

Condé, Alpha

(Encyclopedia) Condé, AlphaCondé, Alphaälˈfä kōnˈdā [key], 1938–, Guinean political leader, president of Guinea (2010–). He lived in France from the age of 15, attended the Sorbonne, and was a…

Condé, Louis II de Bourbon, prince de

(Encyclopedia) Condé, Louis II de Bourbon, prince de, 1621–86, French general, called the Great Condé; son of Henri II de Condé. Among his early victories in the Thirty Years War were those of Rocroi…

condensate

(Encyclopedia) condensate, matter in the form of a gas of atoms, molecules, or elementary particles that have been so chilled that their motion is virtually halted and as a consequence they lose…

condensation

(Encyclopedia) condensation, in physics, change of a substance from the gaseous (vapor) to the liquid state (see states of matter). Condensation is the reverse of vaporization, or change from liquid…