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of or relating to trees; treelike.
Also, arboreous. living in or among trees.
Zoology. adapted for living and moving about in trees, as the limbs and skeleton of opossums, squirrels, monkeys, and apes.
Historical Examples

But such a conception leaves unexplained the great differences between monkeys and gibbons in arboreal and terrestrial activity.
The Outline of History: Being a Plain History of Life and Mankind Herbert George Wells

An arboreal animal which makes itself at home in genealogical trees.
The Devil’s Dictionary Ambrose Bierce

Only four arboreal species are found in the scrub forest, none in the savannas, but eleven in the rainforest.
A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico William E. Duellman

As was stated above, all arboreal gregarious birds have this habit.
Birds of the Indian Hills Douglas Dewar

Mr. Bates has called our attention to the arboreal character of a large share of the animals in the Amazonian forest.
The Andes and the Amazon James Orton

Tits are arboreal in habits; they seldom descend to the ground.
Birds of the Indian Hills Douglas Dewar

arboreal life was an excellent preparatory training toward human development.
The New Stone Age in Northern Europe John M. Tyler

It lives on the ground, but all the other species of this singular genus are arboreal.
The Desert World Arthur Mangin

Tamandua, t-man′dū-a, n. an arboreal ant-eater with prehensile tail.
Chambers’s Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) Various

The mountain on which I stood was covered with trees woven into arboreal palaces.
Lumen Camille Flammarion

adjective
of, relating to, or resembling a tree
living in or among trees: arboreal monkeys
adj.

1660s, from Latin arboreus “pertaining to trees,” from arbor “tree,” of unknown origin, + -al (1).
arboreal
(är-bôr’ē-əl)
Relating to or living in trees.