An Australian bird nf the rail family and genus Tribonyx. See cut under Tribonyx, and compare water-cock.(noun)
The Century Dictionary (Public Domain)
Use "water-hen" in a sentence
"And not a bird was seen or heard, neither rail nor water-hen, wag-tail nor reed-warbler."
"Their place on the water had been taken by a small fleet of ducks, mostly white Aylesburys, but with a visiting mallard in convoy, and one water-hen."
"The males of the white and black water-hen have tails something like those of a pheasant."