[prof1515]

Using a term with an established definition to describe something else in the same field only creates confusion.

To use your example, you won't find any doctors coining diseases with the acronym of AIDS because it causes confusion. Imagine if someone used the term to describe a genetic predisposition to catching the common cold. Would you like to be the patient that the doctor walks in and tells that they've "...got AIDS" or the person who contributes to research only discover it's for a cure for some obscure condition that just means someone gets the sniffles instead of the condition resulting from HIV? I doubt it.

Jason