In recent years, bisexuality has become only one of various orientations identifying with attraction to more than one gender. Eisner (2013) reviews the growing list of identities within the bi-spectrum of "under one umbrella" that include, but are not limited to: pansexual/omnisexual, polysexual, queer, fluid, heterofexible, homoflexible/lesbiflexible, and bicurious.
Source: wiktionary