noun Physics.
a group of electrons in an atom belonging to the same shell and also having the same azimuthal quantum number.

1965–70; sub- + shell Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
subshell  [%PREMIUM_LINK%]     (sŭb'shěl')  Pronunciation Key 
One or more orbitals in the electron shell of an atom with the same energy level. Subshells have different shapes and are distinguished by their magnetic quantum number. See more at orbital, quantum number.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Instead a subshell is started that has access to the allocated resources.
The subshell disappears as soon as it has changed its directory and has no effect on the plot program.
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