Noun
(chemistry) the sum of the relative atomic masses of the constituent atoms of a molecule
Source: WordNetFor example, the mean relative molecular mass of natural water is about 18.015, therefore, one mole of water has a mass of about 18.015 grams. Source: Internet
Hence, the relative molecular mass of a gas can be calculated from the mass of sample of known volume. Source: Internet
The units composing polymers derive, actually or conceptually, from molecules of low relative molecular mass. Source: Internet