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Hrdlička, Aleš

(Encyclopedia) Hrdlička, AlešHrdlička, Alešäˈlĕsh hûrdˈlĭchkä [key], 1869–1943, American anthropologist, b. Humpolec (now in Czech Republic). He received his medical education in the United States.…

hypochondria

(Encyclopedia) hypochondriahypochondriahīˌpəkŏnˈdrēə [key], in psychology, a disorder characterized by an exaggeration of imagined or negligible physical ailment. The hypochondriac fears that such…

Guelph, University of

(Encyclopedia) Guelph, University of, at Guelph, Ont., Canada; provincially supported; nondenominational; coeducational; founded 1964. It has a faculty of graduate studies and schools of hotel and…

complementarity principle

(Encyclopedia) complementarity principle, physical principle enunciated by Niels Bohr in 1928 stating that certain physical concepts are complementary. If two concepts are complementary, an…

sports medicine

(Encyclopedia) sports medicine, branch of medicine concerned with physical fitness and with the treatment and prevention of injuries and other disorders related to sports. Knee, leg, back, and…

absorption

(Encyclopedia) absorption [Lat.,=sucking from], taking of molecules of one substance directly into another substance. It is contrasted with adsorption, in which the molecules adhere only to the…

Kopp, Hermann Franz Moritz

(Encyclopedia) Kopp, Hermann Franz MoritzKopp, Hermann Franz Moritzhĕrˈmän fräntz mōˈrĭts kôp [key], 1817–92, German physical chemist and historian of chemistry. His research concerned the connection…

Drude, Paul Karl Ludwig

(Encyclopedia) Drude, Paul Karl LudwigDrude, Paul Karl Ludwigpoul kärl l&oobreve;tˈvĭkh dr&oomacr;ˈdə [key], 1863–1906, German physicist. Drude first experimented with the physical…

Duhem, Pierre Maurice Marie

(Encyclopedia) Duhem, Pierre Maurice MarieDuhem, Pierre Maurice Mariepyĕr mōrēsˈ märēˈ düĕmˈ [key], 1861–1916, French physicist and philosopher and historian of science. After studying at the École…

insomnia

(Encyclopedia) insomnia, abnormal wakefulness or inability to sleep. The condition may result from illness or physical discomfort, or it may be caused by stimulants such as coffee or drugs. However,…