/ Dictionary / Index A arbor vitae: Meaning and Definition of Find definitions for: ar•bor vi•tae Pronunciation: (är'bur vī'tē), [key] — Anat. Anat. a treelike appearance in a vertical section of the cerebellum, due to the arrangement of the white and gray nerve tissues. ar•bor•vi•tae Pronunciation: (är"bur-vī'tē), [key] — n. any of several ornamental or timber-producing evergreen trees belonging to the genus Thuja, of the cypress family, native to North America and eastern Asia, having a scaly bark and scalelike leaves on branchlets. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arborvitae (Thesaurus) arborous arbour Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language