arbor vitae

[ahr-ber vahy-tee]
noun Anatomy.
a treelike appearance in a vertical section of the cerebellum, due to the arrangement of the white and gray nerve tissues.
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World English Dictionary
arbor vitae (ˈɑːbɔː ˈviːtaɪ, ˈvaɪtiː)
 
n
See also red cedar 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
 
[C17: from New Latin, literally: tree of life]

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Etymonline
Word Origin & History

arbor vitae
type of evergreen shrub, 1660s, name given by Fr. physician and botanist Charles de Lécluse (1525-1609), from L., lit. "tree of life." Used in late 18c. rogue's slang as a cant word for "penis."
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
We require an infusion of hemlock, spruce or arbor vitae in our tea.
Joanne thinks the nest may be located in her arbor vitae hedge.
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