Columbia Encyclopedia

Search results

461 results found

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...

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...

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...

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...

etching

(Encyclopedia)etching, the art of engraving with acid on metal; also the print taken from the metal plate so engraved. In hard-ground etching the plate, usually of copper or zinc, is given a thin coating or ground ...

indigo

(Encyclopedia)indigo [Span.; from Lat.,=Indian], important blue dyestuff used in printing inks and for vat dyeing of cotton (see dye). It was anciently produced in India and was known in Egypt, probably c.1600 b.c....

Great Falls

(Encyclopedia)Great Falls, city (2020 pop. 60,442), seat of Cascade co., N central Mont., second largest city in the state, at the confluence of the Missouri and Sun ...

Groningen, city, Netherlands

(Encyclopedia)Groningen, city, capital of Groningen prov., NE Netherlands. It is an important trade and transportation center. Manufactures include clothing, food pro...

Georgetown, cities, United States

(Encyclopedia)Georgetown. 1 Town (2020 pop. 37,086), Scott co., N central Ky., in the bluegrass country; settled 1776, inc. 1790. In a rich agricultural, ...

Fulton

(Encyclopedia)Fulton, city (2020 pop. 12,490), seat of Callaway co., central Mo., in an agricultural and farm area; inc. 1859. It has printing plants and factories th...