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Regiomontanus

(Encyclopedia)Regiomontanus rēˌjēōmŏnˌtāˈnəs [key] [Lat.,=belonging to the royal mountain, i.e., to Königsberg], 1436–76, German astronomer and mathematician, b. Königsberg. His original name was Johan...

albumin

(Encyclopedia)albumin ălbyo͞oˈmən [key] [Lat.,=white of egg], member of a class of water-soluble, heat-coagulating proteins. Albumins are widely distributed in plant and animal tissues, e.g., ovalbumin of egg, ...

Ferrara

(Encyclopedia)Ferrara fār-räˈrä [key], city, capital of Ferrara prov., in Emilia-Romagna, N Italy. It is a ...

Green, Samuel

(Encyclopedia)Green, Samuel, 1615–1702, early American printer. He established himself at Cambridge, Mass., in 1649, using a press owned by Henry Dunster, the first president of Harvard. Green succeeded Stephen D...

printed circuit

(Encyclopedia)printed circuit, electric circuit in which the conducting paths connecting circuit components are affixed to a flat, insulating base board. The base is typically of plastic, glass, ceramic, or some ot...

parchment

(Encyclopedia)parchment, untanned skins of animals, especially of the sheep, calf, and goat, prepared for use as a writing material. The name is a corruption of Pergamum, the ancient city of Asia Minor where prepar...

drypoint

(Encyclopedia)drypoint, an intaglio printing process in which the lines are scratched directly into a metal plate with a needle; also, the print made from such a plate. Although it is often used in combination with...

Stanhope, Charles Stanhope, 3d Earl

(Encyclopedia)Stanhope, Charles Stanhope, 3d Earl stănˈəp [key], 1753–1816, British politician and inventor; grandson of the 1st earl. He was a friend of the younger William Pitt and married (1774) Pitt's sist...

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...

Wuppertal

(Encyclopedia)Wuppertal vo͝opˈərtäl [key], city (1994 pop. 386,625), North Rhine–Westphalia, W Germany, on the Wupper River. It is an industrial center, formed in 1929 by the merger of Barmen, Elberfeld, Vohw...