Dellosexual refers to someone who experiences attraction to multiple genders and experiences allosexual style attraction to some genders, but is demisexual towards other genders. For example, a dellosexual person may require a close emotional bond with a woman before experiencing any attraction, but they do not need such a connection in order to be attracted to a man.
Dellosexual can be a sexual orientation on its own or can be combined with other orientations. For example, one could be dellosexual and polysexual (dellopolysexual), meaning that when one does experience sexual attraction they can experience it towards multiple genders, but not all genders.
The romantic counterpart is delloromantic.
Etymology
the word "dello" is a combination of "demi" and "allo" because Dellosexual and romantic people are "demisexual towards one gender" while being "allosexual towards another"