On Tue, 25 Oct 2005 09:16:39 +0100, Andy Wade
wrote:

Bob Mannix wrote:

The use of "plug top" rather than plug is rather confined to those who see
themselves as the last defenders of standards in English/Engineering who fly
in the face of reality and common usage (but is not made up).

In that case one would expect to find it in the Oxford English
Dictionary. I have just looked in my "4 inch thick" OED and it's not
there.