I'm unaware of the proper name for this, and was wondering if another wordy out there happened to know it.

A colleague and I were in stitches at a company meeting the other day because our esteemed president repeatedly employed the novel adjective, "stellular." Of course, we understood that this was some bizarre love child of "stellar" and "cellular," but why one would throw these two together (outside of a telecommunications business context where such a non-word might be considered oh-so-clever) escaped us totally. What is it called when we glom two words together like this? It's not really a malapropism, because that requires we use a word that actually exists. Solecism? Simple neologism? Anyone know?

More interestingly, is it just my biases that lead me to believe that 'Business English' is incredibly rife with this phenomenon? Anyone care to speculate as to why?