gram molecule

noun

Chemistry.

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

gram molecule

/ ˌɡræmˈməʊlə /

noun

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

Other Word Forms

• gram-molecular adjective
• gram-molar adjective

Word History and Origins

Origin of gram molecule¹

First recorded in 1890–95

Example Sentences

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