semiarboreal

From semi- +‎ arboreal.

semiarboreal (not comparable)

1. (of a creature) Which sometimes dwells in trees.
   • 1918 September–November, Edgar Rice Burroughs, “The Land That Time Forgot”, in The Blue Book Magazine, Chicago, Ill.: Story-press Corp., →OCLC; republished as chapter IV, in Hugo Gernsback, editor, Amazing Stories, (please specify |part=I to III), New York, N.Y.: Experimenter Publishing, 1927, →OCLC:

     Its large toes protruded laterally as do those of the semiarboreal peoples of Borneo, the Philippines and other remote regions where low types still persist. The countenance might have been that of a cross between Pithecanthropus, the Java ape-man, and a daughter of the Piltdown race of prehistoric Sussex.