Is a super-hero who requires a suit for his super-powers really a super-hero?

I saw Iron Man 2 today and it got me wondering about this. Is Tony Stark really a super-hero? I mean, without the suit he is just a regular guy. I am not a comic book aficionado or anything, but I always figured that in order for someone to rise to the level of super-hero, their powers must be innate, be an actual part of who they are, like Spiderman or Superman or even The Wonder Twins. If the power comes from a suit, can the wearer be considered a super-hero?