What is engineering graphics?

Engineering graphics is a visual means to develop ideas and convey designs in a technical format. Engineering graphics is the dominant means to communication among engineers in industry.

I think it's much like Engineering Drawing:
http://en.wikipedia.org/wiki/Engineering_drawing

Engineering Graphics/Engineering Drawing, is all about perfect representation of a given solid (viewed under specific conditions) under the first/third quadrant system. By and large we follow first angle system.This fills the gap between the design engineer and the production engineer.
It mainly deals with the following major topics:
1) Projection of points/lines/planes/solids
2) Section of solids,
3) Development of lateral surfaces,
4) Isometric projection,
5) Oblique projection,
6) Perspective projection,
7) Scales, and
8) Curves.