Some articles on menstruum:
Immacolata - Powers and Abilities
... Her most distinguishing aspect is the fact that she wields the menstruum a glaring and strangely "alive" force that enables her to fly, create a shield around her body ... Immacolata mentions at one point that only women can wield the menstruum (as does Suzanna later) and also that this force has driven many women mad ... she can attempt to alter the nature of certain objects, thanks to the menstruum ...
... Her most distinguishing aspect is the fact that she wields the menstruum a glaring and strangely "alive" force that enables her to fly, create a shield around her body ... Immacolata mentions at one point that only women can wield the menstruum (as does Suzanna later) and also that this force has driven many women mad ... she can attempt to alter the nature of certain objects, thanks to the menstruum ...
More definitions of "menstruum":
- (noun): (archaic) a solvent.