Originally Posted by Duragrouch

Perhaps, but the definition I noted was expounded in day one of Fluid Dynamics and Heat Transfer by the professor (who I also took for thermodynamics). I've got game in those subjects but they were not my primary area of specialization in industry, so given that prof had a PhD and was a specialist in that area, I accepted his word for it. He didn't harp on it, but just pointed out with amusement, that, despite (in his words) the wrong term used in the actual title of the class, because that is most person's perception of it, that it's actually a redundancy in terms, or as I like to say, repetitively redundant.