Columbia Encyclopedia

Search results

500 results found

Carruthers, George Richard

(Encyclopedia) Carruthers, George Richard, 1939-2020, African-American astrophysicist, b. Cincinnati, OH, Univ. of Illinois at Urbana-Champaign (BS, 1961; MS, nuclear...

fireproofing

(Encyclopedia)fireproofing, method of making normally combustible materials as nearly noncombustible as possible. Fireproofing generally applies to textiles and construction materials that are treated with a soluti...

artificial limb

(Encyclopedia)artificial limb, mechanical replacement for a missing limb. An artificial limb, called a prosthesis, must be light and flexible to permit easy movement, but must also be sufficiently sturdy to support...

Day, Dorothy

(Encyclopedia)Day, Dorothy, 1897–1980, American journalist and social activist, b. New York City. After studying at the Univ. of Illinois (1914–16), where she joined the Socialist party, she returned to New Yor...

X-ray crystallography

(Encyclopedia)X-ray crystallography, the study of crystal structures through X-ray diffraction techniques. When an X-ray beam bombards a crystalline lattice in a given orientation, the beam is scattered in a defini...

Bush, Vannevar

(Encyclopedia)Bush, Vannevar vănˈəvər [key], 1890–1974, American electrical engineer and physicist, b. Everett, Mass., grad. Tufts College (B.S., 1913). He went to Massachusetts Institute of Technology (MIT) ...

Richter, Burton

(Encyclopedia)Richter, Burton rĭkˈtər [key], 1931–2018, American physicist, b. New York City, Ph.D. Massachusetts Institute of Technology, 1956. A professor at Stanford, Richter designed and built a particle a...

Constantine, Donation of

(Encyclopedia)Constantine, Donation of, Lat. Constitutum Constantini, forged document, probably drafted in the 8th cent. It purported to be a grant by Roman Emperor Constantine I of great temporal power in Italy an...

colligative properties

(Encyclopedia)colligative properties, properties of a solution that depend on the number of solute particles present but not on the chemical properties of the solute. Colligative properties of a solution include fr...

Hodgkin's disease

(Encyclopedia)Hodgkin's disease, a type of cancer of the lymphatic system. First identified in 1832 in England by Thomas Hodgkin, it is a type of malignant lymphoma. Incidence peaks in young adults and the elderly....