arboreal
US /ɑːrˈbɔːr.i.əl/
UK /ɑːrˈbɔːr.i.əl/

1.
relating to trees; treelike
:
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The forest was filled with various arboreal species.
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The botanist studied the unique characteristics of arboreal plants.
2.
living in trees
:
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Monkeys are well-known for their arboreal lifestyle.
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Many bird species exhibit arboreal habits, building nests high in the branches.