Tree
A data structure containing zero or more nodes that are linked together in a hierarchy. If any nodes are present, one node is the root; each node except the root is the child of one and only one other node, and each node has zero or more nodes as children.
A hierarchical collection of nodes that can have an arbitrary number of references to other nodes.
A data structure whose elements are linked in a hierarchical fashion.
⠀ Dictionary of Computer and Internet Terms (Vol. 1) John C. Rigdon, 2016 – 1471 c. – 1316