A small mammal native to the tropical forests of Southeast Asia, resembling the shrew, in order Scandentia.

(computing theory) A tree (data structure) set up to facilitate searching.

Alternative spelling of tree shrew

(video games) A hierarchical visual representation of customizations a player can make to their character. Skill trees can either branch out or eventually fold back to a single point depending on the game. Typically some form of skill point is used as opposed to spending experience points.

(video games) A hierarchical representation of technology that may be researched and implemented for the whole faction by the player, most often in real-time strategy games.

(topology) A set that is the union of subsets (called segments), each of which is totally ordered, such that the segments fit together a certain way.

(botany) The chaste tree.

plural of tree trunk

(biology) A branching diagram illustrating the potential evolutionary relationships among biological organisms or other entities which the tree-maker hypothesizes share a common ancestor.

plural of tree-ring