At one time the Army used "Long Colt" to separate this ammo from the shorter 45 Schofield. In my youth I recall factory boxes marked 45 Long Colt. It is not technically incorrect to say Long Colt although it chaffs some people.
I am weary of the whole magazine/clip thing. Yes, a magazine is box and the clip is a spring. So what? Their purpose is the same. Use whatever term you like and I really don't much care.