plica
noun medical specialized uk/ˈplɪk.ə/ us/ˈplaɪ.kə/
[ C ] plural plicae /ˈplɪk.iː/ /ˈplaɪ.kiː/ plicas（皮肤的）皱襞，褶
a fold or ridge in the skin
Plica Syndrome occurs when the plica becomes irritated or inflamed. 当皱襞变得发红或发炎时，就出现了皱襞综合症。
[ U ] (also plica polonica)纠发症
very dirty hair that is twisted into firm, tangled masses