M-ary tree
TREE DATA STRUCTURE IN WHICH EACH NODE HAS AT MOST K CHILDREN. FROM A GRAPH THEORETICAL PERSPECTIVE, K-ARY TREES ARE ACTUALLY ARBORESCENCES.
N-ary tree; K-ary tree; K-way tree; K-ary trees
In graph theory, an m-ary tree (also known as n-ary, k-ary or k-way tree) is a rooted tree in which each node has no more than m children. A binary tree is the special case where m = 2, and a ternary tree is another case with m = 3 that limits its children to three.