Columbia Encyclopedia

Search results

500 results found

Cardozo, Benjamin Nathan

(Encyclopedia)Cardozo, Benjamin Nathan kärdōˈzō [key], 1870–1938, American jurist, associate justice of the U.S. Supreme Court (1932–38), b. New York City. Educated at Columbia Univ., he practiced law until...

learning

(Encyclopedia)learning, in psychology, the process by which a relatively lasting change in potential behavior occurs as a result of practice or experience. Learning is distinguished from behavioral changes arising ...

Nägeli, Karl Wilhelm von

(Encyclopedia)Nägeli or Naegeli, Karl Wilhelm von both: kärl vĭlˈhĕlm fən nāˈgəlē [key], 1817–91, Swiss botanist. He was professor at the Univ. of Munich from 1858 and was noted especially for his work ...

Cooley, Charles Horton

(Encyclopedia)Cooley, Charles Horton, 1864–1929, American sociologist, b. Ann Arbor, Mich., grad. Univ. of Michigan (B.A., 1887; Ph.D., 1894); son of Thomas M. Cooley. He taught in the sociology department at the...

De la Rue, Warren

(Encyclopedia)De la Rue, Warren dĕlˈəro͞o, dĕləro͞oˈ [key], 1815–89, British scientist and inventor. Especially noted as an astronomer, he was a pioneer in celestial photography. He adapted the wet-plate ...

diathermy

(Encyclopedia)diathermy dīˈəthûrˌmē [key], therapeutic measure used in medicine to generate heat in the body tissues. Electrodes and other instruments are used to transmit electric current to surface structur...

amide

(Encyclopedia)amide ămˈīd [key], organic compound formed by reaction of an acid chloride, acid anhydride, or ester with an amine. Under strong acidic conditions an amide can be hydrolyzed to yield an amine and a...

Harden, Sir Arthur

(Encyclopedia)Harden, Sir Arthur, 1865–1940, British biochemist, Ph.D. Univ. of Erlangen, 1888. Harden was a lecturer at the Univ. of Manchester (1888–1897) before becoming a researcher (1897–1930) at the Bri...

sodium thiosulfate

(Encyclopedia)sodium thiosulfate, Na2S2O3, colorless crystalline compound that is more familiar as the pentahydrate, Na2S2O3·5H2O, an efflorescent, monoclinic crystalline substance also called sodium hyposulfite o...

calcination

(Encyclopedia)calcination kălˌsənāˈshən [key], in metallurgy, process of heating solid material to drive off volatile chemically combined components, e.g., carbon dioxide. It is sometimes a step in the extrac...