D defs.my
Entry 2 senses Webster, 1913

Arboreal

/är-bôr'-ē-əl/ · Ar·bo·re·al · IPA /ɑɹˈbɔɹi.əl/
01 a. Of or pertaining to a tree, or to trees; of nature of trees.
  1. 1.
    Of or pertaining to a tree, or to trees; of nature of trees.
  2. 2.
    Attached to, found in or upon, or frequenting, woods or trees; as, arboreal animals.
    “Woodpeckers are eminently arboreal.” Darwin.