arbor vitae

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 [ahr´bor] (pl. ar´bores) (L.)
a tree.
arbor vi´tae treelike outlines seen on median section of the cerebellum.

ar·bor vi·tae

the arborescent appearance of gray and white matter in sagittal sections of the cerebellum.

arbor vitae

The branching arrangement of white matter within the cerebellum.
Herbal medicine
Thuja, see there; Thuja occidentalis.