relative molecular mass

noun

1. the sum of all the relative atomic masses of the atoms in a molecule; the ratio of the average mass per molecule of a specified isotopic composition of a substance to one-twelfth the mass of an atom of carbon-12 Mr r.m.m. Former namemolecular weight

relative molecular mass

1. See molecular weight

Example Sentences

The gene has an ORF encoding a polypeptide of 378 amino acids with a relative molecular mass of 40,415 daltons.

From Nature