Coigne n.  A quoin.
     See you yound coigne of the Capitol? yon corner stone?   --Shak.
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  Coigne, Coign·y n. The practice of quartering one's self as landlord on a tenant; a quartering of one's self on anybody. [Ireland]
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  coigne
       n 1: expandable metal or wooden wedge used by printers to lock up
            a form within a chase [syn: quoin, coign]
       2: the keystone of an arch [syn: quoin, coign]