Aha! Thanks. This is a perfect demonstration of the fundamental problem for search-engine users: of course there would be a "jargon term" that designates exactly the particular concept you have in mind -- but when you don't know that term, searches based on various descriptions of (circumlocutions about) the concept tend to have very low precision (and recall success for such queries can be no better than a crap-shoot). There's no substitute for relevant experience...