Form drag,
profile drag, or
pressure drag, arises because of the
form of the object. The general size and shape of the body is the most important factor in form drag - bodies with a larger apparent cross-section will have a higher drag than thinner bodies. Sleek designs, or designs that are streamlined and change cross-sectional area gradually are also critical for achieving minimum form drag. Form drag follows the
drag equation, meaning that it rises with the square of speed, and thus becomes more important for high speed aircraft.
But I know what you mean about "wingtip vorticies" - that's what I mean, not trailing edge vorticies. I implied, vorticies which roll off the wing tips. I guess I should have been more precise.