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
1925-30
Examples from the web for equivalent weight
For alkalinity, the formula should give the gram equivalent weight.
British Dictionary definitions for equivalent weight
equivalent weight
noun
1.
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