Wiktionary
subcomplex
n. Any structure that is a subdivision of a larger complex
Usage examples of "subcomplex".
Normally, no one would be allowed even to traverse the tunnel without written authorization, much less enter a subcomplex to which he or she was not assigned, but we thought we might be able to get to the projector during the Birthday Days.
He followed Mit's directions, and finally caught up to the subcomplex where Finesse was supposed to be.