Word Origin

Physics . a measure of the stability of an atomic nucleus, equal to 104 multiplied by the mass defect and divided by the mass number. Show More

Origin of packing fraction First recorded in 1925–30

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British Dictionary definitions for packing fraction a measure of the stability of a nucleus, equal to the difference between its mass in amu and its mass number, divided by the mass number Show More

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packing fraction in Science packing fraction [păk′ ĭng]

The ratio of the total volume of a set of objects packed into a space to the volume of that space. The difference between the isotopic mass of a nuclide and its mass number, divided by its mass number. The packing fraction is often interpreted as a measure of the stability of the nucleus. Show More

The American Heritage® Science Dictionary
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