cilium
noun [ C ] biology specialized uk/ˈsɪl.i.əm/ us/ˈsɪl.i.əm/ cilia uk/ˈsɪl.i.ə/ us/ˈsɪl.i.ə/
纤毛（细胞表面上伸出的微小毛状突起，其有节律的运动可产生其周围的液体移动，或帮助单细胞生物的移动）
one of the very small parts like hairs on the surface of a cell that move regularly and keep the surrounding liquid moving around it or help an organism with only one cell to move