Although an infant's color vision is not as sensitive as an adult's, it is generally believed that babies have good color vision by five months of age. Most babies start crawling at about 8 months old, which helps further develop eye-hand-foot-body coordination.
A language tree, or family tree with languages substituted for real family members, has the form of a node-link diagram of a logical tree structure. Such a diagram contains branch points, or nodes, from which the daughter languages descend by different links.
Definition of tree for Students. 1  1 : a long-lived woody plant that has a single usually tall main stem with few or no branches on its lower part. 2  2 : a plant of treelike form a banana tree. 3  3 : something shaped like a tree a clothes tree.