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immunology

(Encyclopedia)immunology, branch of medicine that studies the response of organisms to foreign substances, e.g., viruses, bacteria, and bacterial toxins (see immunity). Immunologists study the tissues and organs of...

Neptune, in astronomy

(Encyclopedia)Neptune, in astronomy, 8th planet from the sun at a mean distance of about 2.8 billion mi (4.5 billion km) with an orbit lying between those of Uranus and the dwarf planet Pluto; its period of revolut...

mass transit

(Encyclopedia)mass transit, public transportation systems designed to move large numbers of passengers. The history of mass transportation is intimately connected to industrialization, urbanization, and the sepa...

Cincinnati, University of

(Encyclopedia)Cincinnati, University of, at Cincinnati; coeducational; founded 1819 as Cincinnati College, incorporated 1870 as a municipal university, opened 1873, affiliated with the state university system 1968....

Fabricius, Johan Christian

(Encyclopedia)Fabricius, Johan Christian yōhănˈ krĭsˈtyän fäbrēˈsyo͝os [key], 1745–1808, Danish entomologist. Influenced by the methods of Linnaeus, under whom he studied, he devised a system of classif...

amobarbital

(Encyclopedia)amobarbital ămˌōbärˈbĭtäl [key], drug that acts as a nervous system depressant. See barbiturate. ...

Ganymede, in astronomy

(Encyclopedia)Ganymede gănˈēmēdˌ [key], in astronomy, one of the moons, or natural satellites, of Jupiter; the largest natural satellite in the solar system, it is larger than the planet Mercury. ...

Kennan, George

(Encyclopedia)Kennan, George, 1845–1924, American authority on Siberia, b. Norwalk, Ohio. In 1864 he made the first of his journeys to East Asia as an engineer. His articles on Siberia, for many years almost the ...

lintel

(Encyclopedia)lintel, in architecture, the horizontal member that spans an opening, such as a door or window, or that connects two columns. The post-and-lintel, or trabeated, system of construction, with spans limi...

smaltite

(Encyclopedia)smaltite smôlˈtīt [key], opaque tin-white to steel-gray mineral of the pyrite group, a compound of cobalt and arsenic. It occurs in massive form, occasionally in crystals (cubes) of the isometric s...