gram-atom

American

Or gram atom

noun

Chemistry.

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

gram atom British

noun

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

Etymology

Origin of gram-atom

First recorded in 1895–1900

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023