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chalco-

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  1. a learned borrowing from Greek meaning “copper,” used in the formation of compound words: chalcolithic.
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Origin of chalco-

< Greek chalko-, combining form of chalkós copper
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for chalco-

chalco-

before a vowel chalc-

combining form
  1. indicating copper or a copper alloychalcopyrite; chalcolithic
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Word Origin

from Greek khalkos copper
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