Are you talking AMCAS? Firstly, the new application for the 2008 cycle doesn't come out for a few months so you can't fill it out yet.
In general, when I filled out mine, I had options like Research/Lab, Community Service/Volunteer-Medical/Clinical, Extracurricular. Thus, I would consider that to be Research/Lab.
If you put down what you think it is, nobody will notice. There is A LOT of info on your AMCAS app and the experience type is probably one of the least important fields IMHO.