gram-atom

or gram atom

noun

, Chemistry.

1. the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element.

gram atom

noun

1. See mole
   an amount of an element equal to its atomic weight expressed in grams: now replaced by the mole See mole 4

Word History and Origins

Origin of gram-atom¹

First recorded in 1895–1900