subsite

noun

sub·​site ˈsəb-ˌsīt 

variants or sub-site

plural subsites or sub-sites

: a site that is part of a larger site

Breitbart.com was launched as a news aggregation site in 2005. Later, a series of topical subsites was added …

—Robin Abcarian

In March, the EPA announced it is going to remove a part of the site called the Callahan subsite [of the Ellisville Superfund site] from its National Priorities List, essentially saying that section is no longer a safety concern.

—Kristen Taketa

Word History

First Known Use

1908, in the meaning defined above