WordReference Random House Unabridged Dictionary of American English © 2020
ar•bo•re•ous  (är bôrē əs, -bōr-),USA pronunciation adj. 
  1. abounding in trees;
    wooded.
  2. Zoologyarboreal (def. 2).
  3. arborescent.
  • Latin arboreus of trees, equivalent. to arbor tree + -eus -eous
  • 1640–50

'arboreous' also found in these entries (note: many are not synonyms or translations):
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