From Pluralpedia, the collaborative plurality dictionary
macarontien (adj.)
Applies tosystems, system functions
CoinerCapri Suns & Gushers🍒🐙 / Soulqueer-Schlatt / Plurgai

Macarontien is a modifier for Hybrid/Chimera/Mixed plurals, who are both Multiple and Median. It’s similar to Specutien, where a plural has their Macaron frontstuck, requiring other members to layer on top of it and mix together/blur/co-con instead of take over.