I've always heard it referred to as a continuity lapse.
In one of Larry Niven's Dream Park novels, his hero is described as black-haired, but a chapter or so later he's looking at his red-haired reflection "as if at a stranger". As well he might...
I'm not sure this is actually a continuity lapse or just a failure to think, but in one of Barbara Hambly's books the heroine views the exotic sight of a flock of "two-legged birds"! (She meant "flightless"...) Oh, and there was the Lyndon Hardy fantasy novel where you could always tell when the characters were in difficulty because of the flocks of "carrion" overhead, but that was just poor vocabulary skills and not a continuity lapse.