Horse iron

(Naut.) a large calking iron.

See also: Horse

References in periodicals archive ?
There was nearly a nasty incident after the finish when third home Arch Rebel jinked and unseated Shay Barry after loose horse Iron Duke ran towards him.
But they often go too fast in this race and, with Holy Smoke almost certain to be up with the pace, I prefer to be on hold-up horse Iron Mountain, ridden by Emma Ramsden.