How to cite the terminology that has different meanings in different contexts but with the same name?
I'd suggest:


Introducing attention maps;
Discussing the specifics of sub-classes gaze maps and importance maps,
without reference to their names; and 
Mention that subclasses are known as attention maps by &lt;> [X] and gaze maps  [Y].


Depending on whether gaze maps and importance maps are the same sub-class, distinct sub-classes, or intersecting sub-classes determines some of the specifics of how I'd handle the final point. As written, I've assumed they are the same-sub-class.