| a. | 1. | Having the form, constitution, or habits, of a proper tree, in distinction from a shrub. |
| 2. | Pertaining to, or growing on, trees; |
| Adj. | 1. | arboreous - inhabiting or frequenting trees; "arboreal apes" Synonyms: tree-living, arboreal |
| 2. | arboreous - abounding in trees; "an arboreous landscape"; "violets in woodsy shady spots"; "a woody area near the highway" | |
| 3. | arboreous - resembling a tree in form and branching structure; "arborescent coral found off the coast of Bermuda"; "dendriform sponges" Synonyms: arborescent, arboresque, arboriform, dendriform, dendroid, dendroidal, tree-shaped, treelike, arboreal |