jarrah /ˈd͡ʒæɹə/ noun2 •A eucalypt tree of species Eucalyptus marginata, occurring in the southwest of Western Australia.In contrast, resistance to root rot fungus in jarrah trees has a significant heritability (Box 5.1), so jarrahs can evolve to resist the introduced dieback. — 2002 •The wood of this tree.The walls were colonial ramparts—logs of jarrah spiked into masonry—with wings as strong as Church buttresses. — 1888 formsjarrahs
