gram molecule

American

noun

Chemistry.

that quantity of a substance whose weight in grams is numerically equal to the molecular weight of the substance.

gram molecule British

/ ˌɡræmˈməʊlə /

noun

an amount of a compound equal to its molecular 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

Other Word Forms

gram-molar adjective
gram-molecular adjective

Etymology

Origin of gram molecule

First recorded in 1890–95

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Oxygen, to which we chemists assign the formula O2, meaning that its molecule consists of two atoms of oxygen, has a weight of 32 grams per gram molecule.

From Project Gutenberg

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