I was a history major and during my senior year, I was selected to participate in a small seminar at a major humanities research library. I wrote my honors undergrad thesis on emergency medicine during the Revolutionary War and worked closely with several faculty members to do my research. My paper won a handful of small awards and I'm definitely planning on mentioning it as "research" on my med school application. It might not be science research, but I think it'll be valuable, none the less. I hope adcoms find it interesting/worthwhile!
Edit: I was actually accepted into a PhD program for my research, but turned it down because I changed my mind and decided I wanted to go to med school instead... I'm not mentioning this to med schools, however, because I don't want them to think I'm overly indecisive! I know that I want to be a doctor of medicine and not have a doctorate in the history of medicine (In the distant future, I'd like to teach the history of medicine at medical schools)