thuja (THOO-juh) - n., any of several evergreen shrubs and trees (genus Thuja and related species), include various dwarf horticultural cultivars.

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The ones actually in Thuja are also known as arborvitae, of which there are five species. [Sidebar: arborvitae is the singular form, with that -ae being a genitive not plural ending -- literally, "tree of life".] Thuja also is used for the wood of the sandarac tree (Tetraclinis articulata), one of those closely related species (also valued for its resin, which makes a varnish) and the origin of the name: thuja is the Latin name (from Greek thuĂa) for sandarac.
---L.
Thanks, WikiMedia!
The ones actually in Thuja are also known as arborvitae, of which there are five species. [Sidebar: arborvitae is the singular form, with that -ae being a genitive not plural ending -- literally, "tree of life".] Thuja also is used for the wood of the sandarac tree (Tetraclinis articulata), one of those closely related species (also valued for its resin, which makes a varnish) and the origin of the name: thuja is the Latin name (from Greek thuĂa) for sandarac.
---L.