Tree wiki:
>This article is about the biological organisms known as trees. For other meanings of the word see tree (disambiguation). A tree can be defined as a large, perennial, woody plant. Though there is no set definition regarding minimum size, the term generally applies to plants at least 6 m (20 ft) high at maturity and, more importantly, having secondary branches supported on a single main stem or trunk (see shrub for comparison). Compared with most other plant forms, trees are long-lived. A few species of trees grow to 100 m tall, and some can live for several thousand years.
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castle wiki:
>The article describes the fortified building. See also castle (disambiguation) A castle (from the Latin castellum, diminutive of castra, a military camp, in turn the plural of castrum or watchpost), is a fort, a camp and the logical development of a fortified enclosure. The term is most often applied to a small self-contained fortress, usually of the Middle Ages, though traditionally in Britain it has also referred to prehistoric earthworks (e.g. Hollingbury Castle, Maiden Castle). "Castle" sometimes denotes citadels (such as the castles of Badajoz and Burgos) or small detached forts d'arrêt in modern times. In Spain, a fortified dwelling on a height for the administering authority retains its Moorish name of alcázar (see illustration, right).
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