Someone who is dello experiences secondary attraction but not primary towards a specific gender or genders, this differs from demisexuality because one who is dello experiences primary attraction. For example, someone who is dello may need an emotional connection with a woman before experiencing any attraction but does not need such a connection in order to be attracted to a man. Dellosexual is on the demi spectrum, meaning it is an a-spec identity.
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.
Dellosexuals 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"