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diabetes

(Encyclopedia)diabetes or diabetes mellitus məlīˈtəs [key], chronic disorder of glucose (sugar) metabolism caused by inadequate production or use of insulin, a hormone produced in specialized cells (beta cells ...

Magnus, Heinrich Gustav

(Encyclopedia)Magnus, Heinrich Gustav hīnˈrĭkh go͝osˈtäf mägˈno͝os [key], 1802–70, German chemist, physicist, and educator. In 1831 he became lecturer and in 1834 professor of physics and technology at t...

water glass

(Encyclopedia)water glass or soluble glass, colorless, transparent, glasslike substance available commercially as a powder or as a transparent, viscous solution in water. Chemically it is sodium silicate, potassium...

Samsonov, Aleksandr Vasilyevich

(Encyclopedia)Samsonov, Aleksandr Vasilyevich əlyĭksänˈdər vəsēˈlyəvĭch səmsôˈnəf [key], 1859–1914, Russian general. Early in World War I, when his army advanced into East Prussia (see Masuria) in o...

Camborne-Redruth

(Encyclopedia)Camborne-Redruth kămˈbôrn, –bûrn, rĕdˈro͞oth [key], town, Cornwall, SW Engla...

pilocarpine

(Encyclopedia)pilocarpine pīlōkärˈpēn [key], naturally occurring alkaloid obtained from plants of the genus Pilocarpus (family Rutaceae). By mimicking the effects of acetylcholine, pilocarpine acts as a stimul...

Visser't Hooft, Willem Adolph

(Encyclopedia)Visser't Hooft, Willem Adolph vĭlˈəm äˈdôlf vĭsˈĕrt hōft [key], 1900–1985, Dutch clergyman, a leader of the Protestant ecumenical movement, b. Haarlem, Netherlands, and educated at Univ. o...

cloud chamber

(Encyclopedia)cloud chamber, device used to detect elementary particles and other ionizing radiation. A cloud chamber consists essentially of a closed container filled with a supersaturated vapor, e.g., water in ai...

hydrogen chloride

(Encyclopedia)hydrogen chloride, chemical compound, HCl, a colorless, poisonous gas with an unpleasant, acrid odor. It is very soluble in water and readily soluble in alcohol and ether. It fumes in moist air. It is...

shaft sinking

(Encyclopedia)shaft sinking, excavation from the surface of an opening in the earth. Shafts, which are generally vertical, are usually distinguished from tunnels, which are horizontal. Little difficulty is experien...