- Oregon cedar, Port Orford cedar, Lawson's cypress, Lawson's cedar, Chamaecyparis lawsoniana - large timber tree of western North America with trunk diameter to 12 feet and height to 200 feet
--1 is a kind of cedar, cedar tree
--1 is a member of Chamaecyparis, genus Chamaecyparis
--1 has substances: Port Orford cedar