subgeneration
noun
sub·gen·er·a·tion ˌsəbˌje-nə-ˈrā-shən
variants or sub-generation
plural subgenerations or sub-generations
: a generation that is part of a larger generation
… Prince tapped into the angst of a subgeneration, those of us sandwiched between the real boomers and Gen Xers.—
Teresa Wiltz
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Merriam-Webster unabridged



