Sectionalization
The Century Dictionary and Cyclopedia
noun.
The act of rendering sectional in scope or spirit.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart
Word Usage
"The Sanctus once again makes use of the sectionalization, this time introducing another tenor and bass duet for the ‘Pleni sunt caeli’."
Hypernym
Words that are more generic or abstract
separation
Hyponym
Words that are more specific
septation
subdivision
zoning