thuja occidentalis(n = noun.plant) american arborvitae, northern white cedar, white cedar - small evergreen of eastern North America having tiny scalelike leaves on flattened branchlets;
is a kind of arborvitae
is a member of genus thuja, thuja

anemone occidentalis, ardea occidentalis, boykinia occidentalis, calycanthus occidentalis, cassia occidentalis, celtis occidentalis, cercis occidentalis, genus thuja, larix occidentalis, platanus occidentalis, pulsatilla occidentalis, ranunculus occidentalis, rubus occidentalis, saxifraga occidentalis, sceloporus occidentalis, senna occidentalis, strix occidentalis, thuja, thuja orientalis, thuja plicata