noun
flagellum
Biology term for the whip-like appendage used for locomotion in many microorganisms.
細菌は鞭毛を使って移動する。
Bacteria move using flagella.
精子の鞭毛は推進力を生み出す。
The flagellum of a sperm cell generates propulsion.
繊毛 (cilia) are shorter, more numerous hair-like structures, while 鞭毛 (flagella) are longer and typically fewer in number.
From 鞭 (whip) + 毛 (hair), describing the whip-like appearance of the structure.