Trees
Trees (Trēz)
Trees (pronounced as "trēz") are perennial plants with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber, or plants above a specified height.
Etymology
The word "tree" comes from the Old English "trēow", which in turn comes from the Proto-Germanic "*trewą", which is thought to be derived from the Proto-Indo-European "*dóru" or "*deru", meaning 'to be firm, solid, steadfast' (hence 'wood'). The term has been used to refer to various types of plants since ancient times.
Related Terms
- Trunk (anatomy): In the context of anatomy, the term "trunk" refers to the torso, the part of an organism's body that is closest to its attachment point.
- Branch (botany): In botany, a branch is a secondary woody stem or limb growing from the trunk or main stem of a tree or shrub or from another secondary limb.
- Leaf: In botany, a leaf is an organ of a vascular plant and is the principal lateral appendage of the stem.
- Perennial plant: A perennial plant or simply perennial is a plant that lives more than two years.
- Woody plant: Woody plants are plants that produce wood as its structural tissue and thus have hard stems.
- Lumber: Lumber, also known as timber, is a type of wood that has been processed into beams and planks, a stage in the process of wood production.
External links
- Medical encyclopedia article on Trees
- Wikipedia's article - Trees
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