What Does It Mean to be "Trisexual"?

Labeling yourself “trisexual” can mean one of two things:
1. You’re willing to “try” anything sexual.
2. You’re not limited to being sexually intimate with males and females, but people who may identify as another gender. (While our society largely recognizes two genders, other cultures have been known to recognize a third or even fourth gender).

Isn't this basicly "pansexual?"
I'm pansexual myself..........I see no reason why my intimate feelings for someone should be limited to what specific genitalia they have.