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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.

Compare Avogadro's number.

Origin of gram-atom

First recorded in 1895–1900

Also called gram-atomic mass, gram-a·tom·ic weight

[gram-uh-tom-ik, -tom-] /ˈgræm əˈtɒm ɪk, -ˌtɒm-/.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for gram atom

gram atom

gram-atomic weight

noun

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

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