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Castillejo, Cristóbal de

(Encyclopedia)Castillejo, Cristóbal de krēstōˈbäl dā kästēlyāˈhō [key], c.1490–1550, Spanish poet of the Renaissance. As secretary to the king of Bohemia, Castillejo visited Vienna and other European c...

Lewis, Sinclair

(Encyclopedia)Lewis, Sinclair, 1885–1951, American novelist, b. Sauk Centre, Minn., grad. Yale Univ., 1908. Probably the greatest satirist of his era, Lewis wrote novels that present a devastating picture of midd...

Lenz's law

(Encyclopedia)Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in 1834, that states that the electromotive force (emf) induced in a conductor moving perpendicular to a magnetic field tends...

Cortázar, Julio

(Encyclopedia)Cortázar, Julio ho͞oˈlyō kōrtäˈzär [key], 1914–84, Argentine novelist, poet, essayist, and short-story writer, b. Brussels. Moving permanently to France in 1951, Cortázar gradually gained r...

Eisenstaedt, Alfred

(Encyclopedia)Eisenstaedt, Alfred, 1898–1995, American photographer, b. Dirschau, Germany (now Tczew, Poland). Widely considered the father of photojournalism, he began creating photo essays in Berlin during the ...

bromide

(Encyclopedia)bromide, any of a group of compounds that contain bromine and a more electropositive element or radical. Bromides are formed by the reaction of bromine or a bromide with another substance; they are wi...

ratchet and pawl

(Encyclopedia)ratchet and pawl, mechanical device that permits motion in one direction only. The ratchet is usually a wheel with slanting teeth. The pawl is a lever tangential to the wheel with one end resting on t...

motor, electric

(Encyclopedia)CE5 Motor: In the AC motor, current fed to the conducting loop of wire causes it to rotate in the magnetic field, thus turning the shaft on which the loop is mounted. In the DC motor, the direction...

Krusenstjerna, Agnes von

(Encyclopedia)Krusenstjerna, Agnes von ängˈnās vôn kro͞osĕnshĕrˈnä [key], 1894–1940, Swedish novelist. Krusenstjerna's works reflect the aristocratic and emotionally disturbed background from which she c...

Theophrastus

(Encyclopedia)Theophrastus thēˌōfrăsˈtəs [key] [Gr.,=divinely speaking], c.372–c.287 b.c., Greek philosopher, Aristotle's successor as head of the Peripatetics. The school flourished under his leadership. H...