"Tree trunk" redirects here. For the song by The Doors, see Tree Trunk.
In botany, trunk (or bole) refers to the main structural member of a tree that supports the branches and is supported by and directly attached to the roots. The trunk is covered by the bark, which is an important diagnostic feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk is the most important part of the tree for timber production.
Trunks can be vulnerable to damage, including sunburn.
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