TheMadScientist - 11:45 am on Jan 12, 2013 (gmt 0)
It says "Web definition" then shows the exact definition from the deleted glossary page followed by a link to it.
Yeah, that sounds like my 'not so simple' guess ... lol
I would guess it's one of those glitches it'll take them a bit to figure out how to 'undo' and get a set definition that leads to a 404 page as a reference backed out of the system and have the system to 'redefine it' again from some other site, automatically, of course ... I'm sure someone could probably go in there by hand, but they definitely prefer scalable automation over anything along those lines, so I would guess it'll be a bit before it disappears.
Maybe throw a page up and catch some clicks for a bit?
Or, if you want to try to just be done with it and get it out yourself, maybe change the 404 to 410 and see what happens? It does seem like they would almost have to have a way to drop a reference to a 404 page written in to the definition system already and maybe it just takes a longer time than we'd think...
I does seem plausible it's 'stuck' though if the 'definition generation' system isn't 'hooked into' the removal tool, so maybe if you can get a 410 to gBot rather than a 'not found for some reason, could be temporary' message it'll drop out ... (I'm thinking it might be something along the lines of how much sooner a 410 is dropped from the regular results than a 404 is.)