Peter, I don't know what one is either, however it occurs to me that Aton, in ancient Egypt, was the Sun god. Perhaps the sundial was called "sun-***" where *** is the Plekh part. The Greeks could have borrowed the word from the Egyptian language.
----- Original Message ----- From: "Peter Tandy" <[EMAIL PROTECTED]> Subject: Plekhnatons (slightly off-topic) -