atomic mass(redirected from Isotopic mass)
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The mass of an atom, usually expressed in atomic mass units.
the mass of an isotope of an element measured in units based on 1/12 the mass of the carbon-12 atom. Abbr.: at. m.
The mass of a given atom or molecule, expressed in atomic mass units. Compare atomic weight.
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|Noun||1.||atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units|
mass - the property of a body that causes it to have weight in a gravitational field
combining weight, eq, equivalent weight, equivalent - the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen