miesiczkowe
Miesiczkowe is not a recognized term in standard dictionaries or reference works. It does not appear as a defined concept, place, or organization in broad encyclopedic sources. Its rarity and lack of authoritative usage suggest that the form may be a misspelling, a highly specialized neologism, or a hypothetical entry rather than a stable, widely used label.
In Polish orthography the non-diacritic form suggests two likely intended words with diacritics: miesięczkowe or miesiączkowe.
If encountered in text, the surrounding context should help determine meaning. As a potential proper noun, miesiczkowe
In summary, miesiczkowe is not an established entry in Polish lexicons, and any interpretation depends on context