subniche

noun

sub·​niche ˌsəb-ˈnich 

 also  -ˈnēsh,

 or  -ˈnish

variants or sub-niche

plural subniches or sub-niches

: a portion of a niche (such as a part of a specialized market)

Because ebooks are digital, Amazon can afford to give each subniche (where there might only be 20-30 books) a bestseller count.

—Dennis Posadas

Word History

First Known Use

1989, in the meaning defined above