(chiefly AU) Any of several unrelated eucalypts that have dark, deeply furrowed bark. from 18th c.
(chiefly AU) The hard wood of these trees, as used in building and construction. from 19th c.
1985, Peter Carey, Illywhacker, Faber and Faber 2003, p. 319:When he had trimmed a bit of ironbark to size, or knocked the worst splinters off a split fence post, he would swing it around his head a few times before crashing it down on the rails.
