equivalent weight

noun

Chemistry.

1. 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.

equivalent weight

noun

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

Word History and Origins

Origin of equivalent weight¹

First recorded in 1925–30