subproject

noun

sub·​proj·​ect ˌsəb-ˈprä-ˌjekt 

-jikt,

 also  -ˈprō-

variants or sub-project

plural subprojects or sub-projects

: a project that is part of a larger project

… divided the … project into discrete subprojects to facilitate delivery of specific work scope in shorter timeframes …

—Francie Israeli

Word History

First Known Use

1877, in the meaning defined above