nictitating membrane（瞬膜）是什么意思？音标发音+图解场景

瞬膜 /ˈnjuː ˈfjuːəl ˈstɔːɹɪdʒ ˈɹuːm/ n

English: nictitating membrane · 瞬膜

释义：Thin muscular membrane extending sideways from the inside corner of the eye to protect and moisten it.

这个词出现在以下图解场景（1）