>>When I run reports for users I sometimes call them Non-Matches in reports that check for parents of details in child tables. A detail with no parent, I will call a Non-Match(Meaning; no matching data).
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>In such case, orphan is the terminology.

Yes - orphan. This reminds me of something I wrote for a client once. They wanted a button on a screen that would go out and delete all the orphan records. So I made the button and had the caption on the button... "Orphan Killer" ... which from a programming standpoint sounded kinda cool to me, however it horrified the poor little old lady in the office that had to run the screen. (ooops)