Related definitions and achieve binary tree

First, some concepts

Tree, subtree, nodes, leaf (terminal node), branch nodes (terminal node points);

Represents the number of nodes in the subtree of the node has, is the maximum value of the tree of nodes in the tree;

Child nodes (child), parent (parents), siblings, fathers, sons, cousins, depth or height;

Refers to a number of forest trees or disjoint tree, for each node in the tree, the set of which is the sub-tree forests;

Binary tree, full binary tree;

Complete binary tree refers to