Thu·ja n. Bot. A genus of evergreen trees, thickly branched, remarkable for the distichous arrangement of their branches, and having scalelike, closely imbricated, or compressed leaves. [Written also thuya.] See Thyine wood.
Note: ☞ Thuja occidentalis is the {Arbor vitae} of the Eastern and Northern United States. Thuja gigantea of North-western America is a very large tree, there called red cedar, and canoe cedar, and furnishes a useful timber.
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