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callais

British  
/ kəˈleɪɪs /

noun

  1. a green stone found as beads and ornaments in the late Neolithic and early Bronze Age of W Europe

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of callais

C19: from Greek kallais

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