molecular mass

mass (mas)

1. a lump or collection of cohering particles.

2. a cohesive mixture to be made into pills.

3. the characteristic of matter that gives it inertia. Symbol m.

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atomic mass  atomic weight; used particularly when describing a single isotope of a nuclide.

inner cell mass  embryoblast.

lean body mass  that part of the body including all its components except neutral storage lipid; in essence, the fat-free mass of the body.

molar mass  (M ) the mass of a molecule in grams (or kilograms) per mole.

molecular mass  the mass of a molecule in daltons, derived by addition of the component atomic masses. Its dimensionless equivalent is molecular weight.

relative molecular mass  technically preferable term for molecular weight. Symbol M r.

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molecular mass,

the mass of a molecule of a substance as compared with the mass of an atom of carbon-12. It is equal to the sum of the masses of its constituent atoms and is measured in daltons. Formerly called molecular weight. See also atom, atomic mass, molecule.

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molecular mass,

n See molecular weight.