Columbia Encyclopedia

Search results

500 results found

isomorphism

(Encyclopedia)isomorphism īˌsəmôrˈfĭzəm [key], of minerals, similarity of crystal structure between two or more distinct substances. Sodium nitrate and calcium sulfate are isomorphous, as are the sulfates of...

anion

(Encyclopedia)anion ănˈīˌən [key], atom or group of atoms carrying a negative charge. The charge results because there are more electrons than protons in the anion. Anions can be formed from nonmetals by reduc...

Bratianu

(Encyclopedia)Bratianu –nô [key], Romanian family. Ion Bratianu, 1821–91, was prominent in the Revolution of 1848 and helped to secure (1866) the election of Prince Carol of Hohenzollern-Sigmaringen (Carol I o...

Romanian literature

(Encyclopedia)Romanian literature, the literature of Romania. Until the 16th cent. most writing by Romanians was in Slavonic. In 1541 a catechism in Romanian was issued at Sibiu, and from 1560 liturgical works were...

East African Community

(Encyclopedia)East African Community (EAC), organization of E African nations established to promote regional economic and political cooperation. Its headquarters are in Arusha, Tanzania. It was first founded in 19...

Westminster, Statute of

(Encyclopedia)Westminster, Statute of, 1931, in British imperial history, an act of the British Parliament that gave formal recognition to the autonomy of the dominions of the British Empire and was in effect the f...

cation

(Encyclopedia)cation kătˌīˈən [key], atom or group of atoms carrying a positive charge. The charge results because there are more protons than electrons in the cation. Cations can be formed from a metal by oxi...

sulfate

(Encyclopedia)sulfate, chemical compound containing the sulfate (SO4) radical. Sulfates are salts or esters of sulfuric acid, H2SO4, formed by replacing one or both of the hydrogens with a metal (e.g., sodium) or a...

Kansas State University

(Encyclopedia)Kansas State University, main campus at Manhattan; coeducational; land-grant and state supported; chartered and opened 1863. There is an additional campus at Salina. Among the university's research fa...

Iron Guard

(Encyclopedia)Iron Guard, Romanian nationalistic, anti-Semitic, and antiparliamentary group, founded in 1924 by Corneliu Zelea Codreanu. Originally named the Legion of the Archangel Michael, it was organized on mil...