Single word for Egyptian profile
Solution 1:
Disclaimer: not an Egyptologist
"Composite pose" or "composite perspective" appear to be the terms of art most appropriate for what you're getting at, although it may not necessarily signify if your reader doesn't already have context for it.
Here is some more on the significance of those choices, which may be handy to draw from: http://mentalfloss.com/article/64752/why-does-egyptian-art-look-so-flat-and-static