Girls vs. Women

Okay, here’s the deal:  I’m the president of my all-female residence hall at my university.  I love my home and I love helping form this community of strong women leaders for my campus.  But one thing that has come up in our meetings (particularly with out brother and sister halls) is that people refer to our residents as "girl" not as "women."  I try to always use women because we’re (mostly) all over 18 which means that legally we’re women (just like the males living in our brother hall are men).  Is there anyway that I can bring up this issue without looking like a bitch?  I don’t think the rest of hall government would be very responsive, and I don’t want to alienate people if I don’t have to.  Any suggestions?