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[kyoo-pruh s, koo-] /ˈkyu prəs, ˈku-/
containing copper in the univalent state, as cuprous oxide, Cu 2 O.
Origin of cuprous
1660-70; cupr- + -ous Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for cuprous
Historical Examples
  • A solution of cuprous chloride which has absorbed CO gives it up on being treated with potassic bichromate and acid.

    Poisons: Their Effects and Detection Alexander Wynter Blyth
  • Those are chromic acid, cuprous chloride (sub- or proto-chloride of copper), and bleaching- powder.

  • The cupric salts are much the more common of the two, since the cuprous salts pass readily into cupric by oxidation.

  • Firstly, by no means all bronzes which have been dug up, even though from the same excavation, show the layer of cuprous oxide.

  • In a general way, according to the later authors, they were largely lead oxide, and contained from 5% to 20% cuprous oxide.

    De Re Metallica Georgius Agricola
  • It contains chlorine, apparently as cuprous chloride, sometimes in considerable quantity.

  • The metal itself is to a greater or less depth converted into cuprous oxide.

  • A slow reaction takes place and a double compound of cuprous chloride and sodium chloride is formed.

  • "Frankoline," a mixture of cuprous and ferric chlorides dissolved in strong hydrochloric acid absorbed in infusorial earth.

  • A and B give no evidence of sugar, while C reduces the Fehling, giving a yellow or red deposit of cuprous oxide.

    A Practical Physiology Albert F. Blaisdell
British Dictionary definitions for cuprous


of or containing copper in the monovalent state
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
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cuprous in Science
  (k'prəs, ky'-)   
Containing copper, especially copper with a valence of 1. Compare cupric.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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