division
noun
the act or process of dividing; state of being divided.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Light may have been admitted divisionally in the centre of this great vault, as I previously mentioned, as well, as by the semi-circular arches in the "clear storey."
From The Excavations of Roman Baths at Bath by Charles E. Davis