subdivision

an area composed of subdivided lots

the act of subdividing; division of something previously divided

a division of some larger or more complex organization; "a branch of Congress"; "botany is a branch of biology"; "the Germanic branch of Indo-European languages"

a self-contained part of a larger composition (written or musical); "he always turns first to the business section"; "the history of this work is discussed in the next section"

a section of a section; a part of a part; i.e., a part of something already divided