"arboreous" in the adjective sense
1. arboreal, arboreous, tree-living
inhabiting or frequenting trees
"arboreal apes"
2. arboraceous, arboreous, woodsy, woody
abounding in trees
"an arboreous landscape"
"violets in woodsy shady spots"
"a woody area near the highway"
3. arboreal, arboreous, arborescent, arboresque, arboriform, dendriform, dendroid, dendroidal, treelike, tree-shaped
resembling a tree in form and branching structure
"arborescent coral found off the coast of Bermuda"
"dendriform sponges"
Source: WordNet® (An amazing lexical database of English)
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