substate
noun
sub·state
| \ ˈsəb-ˌstāt
\
\
variants:
or sub-state
plural substates
or sub-states
Definition of substate
: a state (such as a physical or atomic state) that is a variant or division of another more broadly defined state
… each quantum state of a given spin angular momentum is split into a number of substates …— Arthur L. Robinson
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