compartition

from The Century Dictionary.

• noun The act of dividing into parts; specifically, in architecture, the division or disposition of the whole ground-plan of an edifice into its various apartments.
• noun A division; the part divided; a separate part.

from the GNU version of the Collaborative International Dictionary of English.

• noun obsolete The act of dividing into parts or compartments; division; also, a division or compartment.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun obsolete The act of dividing into parts or compartments.
• noun obsolete A division or compartment.