A rooted tree in which the order of the subtrees is significant. There is a one-to-one correspondence between ordered forests with nodes and binary trees with nodes.
Ordered Tree
See also
Binary Tree, Forest, Rooted TreeExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Ordered Tree." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/OrderedTree.html