I'd rather call them parameters or indexes. Certainly not dimensions analogous to 1/2/3D. People have been storing things in 5D on wood substrate for years. Li

I'd rather call them parameters or indexes. Certainly not dimensions analogous to 1/2/3D. People have been storing things in 5D on wood substrate for years. Like clothes in the closet (the 2 extra Ds might be type and color). The terminology is clearly mean to impress the general audience that would normally not even bother to read a classic "engineering" title.