trifurcate
verb (used without object)
to divide into three forks or branches.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
They formed a clump of three columns close together, which might well be the mere bifurcation, or rather trifurcation, of one tree, the lower part being lost or sunken in the thick wood around.
From The Trees of Pride by Chesterton, G. K. (Gilbert Keith)