A ternary tree is a rooted tree in which each vertex has at most three children.
Ternary Tree
See also
Binary Tree, Complete Ternary TreePortions of this entry contributed by David Terr
Explore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W., with contributions by David Terr. "Ternary Tree." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/TernaryTree.html