While visiting: http://www.instructionaldesign.org/index.html

I found the term “wireframe” in the context of designing instruction models.  I had never heard of it – but Wikipedia had:

From Wikipedia, the free encyclopedia

website wireframe (also “web wire frame”, “web wireframe”, “web wireframing”) is a basic visual guide used in interface designto suggest the structure of a website and relationships between its pages. A webpage wireframe is a similar illustration of the layout of fundamental elements in the interface. Typically, wireframes are completed before any artwork is developed.

Source: http://en.wikipedia.org/wiki/Website_wireframe

More info on the ID Tools page – right there →