This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

verb-intransitive. To have or produce branching formations, as the bronchial tubes of the lungs.

v. Alternative spelling of arborise.

To give a tree-like appearance to: as, “an arborized or moss-agate,” Wright. Also spelled arborise.

To divide into numerous branches.

v. branch out like trees

"A second set of fibers from the medial and lateral nuclei end partly in the tegmentum, while the remainder ascend in the medial longitudinal fasciculus to arborize around the cells of the nuclei of the oculomotor nerve."

separate    fork    ramify    branch    furcate