gram-atom
or gram atom
noun Chemistry.
the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element.
Also called
gram-atomic mass,
gram-a·tom·ic weight
[gram-uh-tom-ik, -tom-] /ˈgræm əˈtɒm ɪk, -ˌtɒm-/.
Compare
Avogadro's number.
Origin of gram-atom
First recorded in 1895–1900