from
The Collaborative International Dictionary of English v.0.48
Subdivide \Sub`di*vide"\, v. t. [imp. & p. p. {Subdivided}; p.
pr. & vb. n. {Subdividing}.] [L. subdividere, sub under +
dividere to divide. See {Divide}.]
To divide the parts of (anything) into more parts; to part
into smaller divisions; to divide again, as what has already
been divided.
[1913 Webster]
The progenies of Cham and Japhet swarmed into colonies,
and those colonies were subdivided into many others.
--Dryden.
[1913 Webster]