1. 生活在树上的；栖于树木的
Arboreal animals live in trees.
2. 树木的
Arboreal means relating to trees.
1. inhabiting or frequenting trees
e.g. arboreal apes
Synonym: arboreoustree-living
2. resembling a tree in form and branching structure
e.g. arborescent coral found off the coast of Bermuda
dendriform sponges
Synonym: arboreousarborescentarboresquearboriformdendriformdendroiddendroidaltreeliketree-shaped
3. of or relating to or formed by trees
e.g. an arborous roof