coign
 突出之角,隅,隅石


 Coign n. A var. spelling of Coin, Quoin, a corner, wedge; -- chiefly used in the phrase coign of vantage, a position advantageous for action or observation.
    From some shielded nook or coign of vantage.    --The Century.
    The lithosphere would be depressed on four faces; . . . the four projecting coigns would stand up as continents.    --Nature.

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 coign
      n 1: expandable metal or wooden wedge used by printers to lock up
           a form within a chase [syn: quoin, coigne]
      2: the keystone of an arch [syn: quoin, coigne]