arbor vitae

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arborvitae
white cedar
Thuja occidentalis

ar·bor·vi·tae

also ar·bor vi·tae  (är′bər-vī′tē)
n.
1. Any of several North American or eastern Asian evergreen trees or shrubs of the genus Thuja, having flattened branchlets with opposite, scalelike leaves and small cones. They are grown as ornamentals and for timber. Also called thuja.
2. Any similar plant of the related genera Platycladus or Thujopsis.
3. Anatomy The white nerve tissue of the cerebellum, which has a treelike outline in a median section.

[From New Latin arbor vītae, tree of life : Latin arbor, tree + Latin vītae, genitive of vīta, life; see vital.]

arbor vitae

(ˈɑːbɔː ˈviːtaɪ; ˈvaɪtiː) or

arborvitae

n
(Plants) any of several Asian and North American evergreen coniferous trees of the genera Thuja and Thujopsis, esp Thuja occidentalis, having tiny scalelike leaves and egglike cones. See also red cedar
[C17: from New Latin, literally: tree of life]
References in classic literature ?
We require an infusion of hemlock, spruce or arbor vitae in our tea.