(Science: botany) A genus of evergreen trees, thickly branched, remarkable for the distichous arrangement of their branches, and having scalelike, closely imbricated, or compressed leaves.
Alternative forms: thuya See thyine wood.
Thuja occidentalis is the arbor vitae of the Eastern and northern united states. T. Gigantea of North-waetern America is a very large tree, there called red cedar, and canoe cedar, and furnishes a useful timber. Thuja oil. Cedar leaf oil. Thujone. N. An oil, C10H16O, the chief constituent of cedar leaf oil. A stimulant similar to camphor. Also called thujol, thuyol, absinthol, thuyone, tanacetol, tanacetone.
Origin: NL, from Gr. An African tree with sweet-smelling wood.