Not according to the Oxford English Dictionary it isn't....lol.
It's a Bull Bar.
I wouldn't trust the Oxford dictionary, have you seen the words added in the last decade, lol
A bull bar covers the front of the vehicle, a nudge bar protects the radiator area, even the manufacturer calls them a nudge bar.
To be fair, i have to agree with Sabre, it is a pram-bar, as they really don't offer anything for off road, apart from hanging some lights on them.
In reality, bull bars and nudge bars don't offer much protection in the modern vehicles, as any decent impact will set off the airbags, disabling the vehicle.
I've driven a lot of outback roads, had many close calls with Kangaroos, Emu's, Bulls/cows/buffalo, but touch wood we haven't connected, as those large bovines will stop you in your tracks