I know, it's incorrect. But I thought, it would be easier that way, because the Oxford dictionaries would be well known, so everybody would know what I was talking about. At least in England you see all kinds of Oxford dictionaries in any bookshop, and I've got a littlecollection here on my bokshelf - unfortunately only the concise paperback versions. In the States this may be different, I don't know.
So maybe people start getting puzzled, and if they do I should stop using "Oxford" as a general term for these helpful books. Thanks for pointing this out, Chrisell!
Andy ;—)