Axigender is a gender in which a person experiences two genders which can be described as sitting on two ends of an axis. One of these genders is agender, and the other is any other gender. These genders are experienced one at a time with no overlap, and with a very short transition time between them.
Axigender is different from bigender because there is no overlap and agender is always one of the possible states. It is different from genderflux as there is no smooth fluctuating; one either has a certain gender or none at all, at any given time.