One of the parts into which something is divided
A part of a family, tribe, or other group, or of such a group's language, that is believed to stem from a common ancestor
It is no more than an interesting subdivision in a general theory.
While Sackler and DeLeo owned homes in the same subdivision, Dean rented a small house in the older part of town with Fred O'Connor, his elderly stepfather.
Barrackpur subdivision was formed in 1904.
The last subdivision is fundamental.