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chalcogen

[kal-kuh-juh n, -jen]
noun
  1. Chemistry. any of the elements oxygen, sulfur, selenium, tellurium, and polonium, which form the VIa group in the periodic table.
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Origin of chalcogen

First recorded in 1960–65; chalco- + -gen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for chalcogen

chalcogen

noun
  1. any of the elements oxygen, sulphur, selenium, tellurium, or polonium, of group 6A of the periodic table
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Word Origin for chalcogen

C20: from chalco (pyrite) + -gen
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