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mustard gas
(Encyclopedia)mustard gas, chemical compound used as a poison gas in World War I. The burning sensation it causes on contact with the skin is similar to that caused by oil from black mustard seeds. The compound is ...Bayonne, town, France
(Encyclopedia)Bayonne bäyônˈ [key], town, Pyrénées-Atlantiques dept., SW France, in Gascony, on the Ad...sea level
(Encyclopedia)sea level, the level of the sea, which serves as the datum used for measurement of land elevations and ocean depths. Theoretically, one would expect sea level to be a fixed and permanent horizontal su...carbon monoxide
(Encyclopedia)carbon monoxide, chemical compound, CO, a colorless, odorless, tasteless, extremely poisonous gas that is less dense than air under ordinary conditions. It is very slightly soluble in water and burns ...Venus, in astronomy
(Encyclopedia)Venus, in astronomy, 2d planet from the sun; it is often called the evening star or morning star and is brighter than any object in the sky except the sun and the moon. Because its orbit lies between ...carbon
(Encyclopedia) CE5 The three solid forms of pure carbon: In the diamond crystal each carbon atom is surrounded symmetrically by four other carbons (at each of the four corners of a tetrahedron). In the graphite c...Grignard reagent
(Encyclopedia)Grignard reagent grēnyärdˈ rēāˈjənt [key], any of an important class of extremely reactive chemical compounds used in the synthesis of hydrocarbons, alcohols, carboxylic acids, and other compou...keratin
(Encyclopedia)keratin kĕrˈətĭn [key], any one of a class of fibrous protein molecules that serve as structural units for various living tissues. The keratins are the major protein components of hair, wool, nail...Archaebacteria
(Encyclopedia)Archaebacteria ärˌkēbăktĭrˈēə [key], diverse group of bacteria (prokaryotes), sometimes called the archaea and considered a major group unto themselves. Archaebacteria are contrasted with the ...Iwo Jima
(Encyclopedia)Iwo Jima tō [key], volcanic island, c.8 sq mi (21 sq km), W Pacific, largest and most important of the Volcano Islands. Mt. Suribachi, 546 ft (166 m) high, on the south side of the island, is an exti...Browse by Subject
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