Bulette: Thank you, thank you, thank you. I'd plum* run out of jargon to pepper my patter. But now, "Euclidian distance" is going to be my new buzzword. May add "hypoteneutical," "arctan" and "arcsin" too, in case anyone's in danger of catching on that I'm speaking nonsense. I find that once the geometry comes out, the attention disappears.
(*pun ntended.)