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nitrate
(Encyclopedia)nitrate, chemical compound containing the nitrate (NO3) radical. Nitrates are salts or esters of nitric acid, HNO3, formed by replacing the hydrogen with a metal (e.g., sodium or potassium) or a radic...chloride
(Encyclopedia)chloride klōrˈīd, klôrˈ– [key], chemical compound containing chlorine. Most chlorides are salts that are formed either by direct union of chlorine with a metal or by reaction of hydrochloric ac...ulcer
(Encyclopedia)ulcer, open sore or circumscribed erosion, usually slow to heal, on the skin or mucous membranes. It may develop as a result of injury; because of a circulatory disturbance, e.g., in varicose veins or...superconductivity
(Encyclopedia)superconductivity, abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped sudd...syphilis
(Encyclopedia)syphilis sĭfˈəlĭs [key], contagious sexually transmitted disease caused by the spirochete Treponema pallidum (described by Fritz Schaudinn and Erich Hoffmann in 1905). Syphilis was not widely reco...Guangdong
(Encyclopedia)Guangdong or Kwangtung both: gwängˈdo͝ongˈ [key], province, c.76,000 sq mi (196,891 s...New Brunswick, province, Canada
(Encyclopedia)CE5 New Brunswick, province (2001 pop. 729,498), 28,345 sq mi (73,433 sq km), including 519 sq mi (1,345 sq km) of water surface, E Canada. The Mi'kmaq, an indigenous people whose settlements s...magnetism
(Encyclopedia)CE5 Lines of induction around a single bar magnet and between opposite poles of different magnets magnetism, force of attraction or repulsion between various substances, especially those made of i...Elements (table)
(Encyclopedia)Elements 1 Parentheses indicate most stable isotope; brackets enclose lower and upper bounds of weight variation. ...Kyrgyzstan
(Encyclopedia)CE5 Kyrgyzstan kērgĭstänˈ [key], officially Kyrgyz Republic, republic (2015 est. pop. 5,865,000), c.76,600 sq mi (198,400 sq km), central Asia. It borders on China in the southeast, on Kazakhst...Browse by Subject
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