I tend to be a little contemptuous of what we call Conceptual Models in the biz. If you don't know what these are, Wikipedia defines them as such: A conceptual model is a representation of a system. It consists of concepts used to help people know, understand, or simulate a subject the model represents. It is also a set of concepts. In contrast, physical models are physical objects, such as a toy model that may be assembled and made to work like the object it represents.
Here's my definition of Conceptual Model: What PhDs do when given a set of 64 Crayola crayons, with the sharpener, of course.
I'm more of a word guy, myself. But alas, I'm going to succumb to temptation and fall off the wagon and do my own ConMo. See below.