形容詞 cacuminal:

1. pronounced with the tip of the tongue turned back toward the hard palate
   同義詞：retroflex

ca.cu.mi.nal

adj.（形容詞）
Articulated with the tip of the tongue turned back and up toward the roof of the mouth; retroflex.
卷舌音的：舌尖在嘴中前后上下運(yùn)動而發(fā)出清晰的聲音；卷舌音的

來源：
From Latin cacômen cacômin- [summit, point]
源自 拉丁語 cacômen cacômin- [頂端，頂點]