Thorn tree
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Thorn tree may refer to:
- The common name for several species of trees in tropical or temperate climates that have spiky, thornlike leaves, e.g. the Acacia and the boxthorn (Lycium)
- Thorntree, a housing estate in the town of Middlesbrough, in North East England
- A long-running travel-related discussion forum on the Web site of Lonely Planet.