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equivalent weight

noun, Chemistry.
the combining power, especially in grams (gram equivalent) of an element or compound, equivalent to hydrogen as a standard of 1.00797 or oxygen as a standard of 8; the atomic weight divided by the valence.
Origin of equivalent weight
1925-30 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for equivalent-weight

equivalent weight

the weight of an element or compound that will combine with or displace 8 grams of oxygen or 1.007 97 grams of hydrogen Also called gram equivalent
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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