involute/ˈɪnvəlu:t; `ɪnvəˌlut/ (also involuted) adj1 complex or intricate 复杂的; 纷繁的.2 (botany 植) (esp of leaves or petals in bud and of shells) curling inwards at the edges （尤指叶片或花蕾的瓣及甲壳）边缘向内卷曲的, 内卷的, 内旋的.
牛津英汉双解词典