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. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
arbor vitae (ˈɑːbɔː ˈviːtaɪ, ˈvaɪtiː)
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]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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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