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Castner process

a process for extracting sodium from sodium hydroxide, devised by Hamilton Young Castner (1858–98)


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  • Castor-and-pollux

    twin sons of Leda and brothers of Helen, famous for their fraternal affection and regarded as the protectors of persons at sea. noun (classical myth) the twin sons of Leda: Pollux was fathered by Zeus, Castor by the mortal Tyndareus. After Castor’s death, Pollux spent half his days with his half-brother in Hades and half […]

  • Castor-bean

    the seed of the castor-oil plant. castor-oil plant. Historical Examples Horse mint and palm of crystal (castor-bean) and bullnettle root boiled together will make a cure fer swelling. Slave Narratives, Oklahoma Various Some genera like the castor-bean (Ricinus) and Croton are cultivated for their large, showy leaves. Elements of Structural and Systematic Botany Douglas Houghton […]

  • Castor-oil

    a colorless to pale yellow, viscid liquid, usually obtained from the castor bean by a pressing process: used as a lubricant, in the manufacture of certain soaps and creams, and in medicine chiefly as a cathartic. Historical Examples The castor-oil plant is found growing abundantly in Sumatra, particularly near the sea-shore. A Catechism of Familiar […]

  • Castor-sugar

    finely ground or powdered sugar. noun finely granulated sugar; also called superfine sugar , caster sugar Word Origin from the small vessel with a perforated top from which to sprinkle sugar Usage Note British cooking

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