名詞 flagellum:

1. a whip used to inflict punishment (often used for pedantic humor)
   同義詞：scourge
2. a lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)

fla.gel.lum

n.（名詞）
【復數】 fla.gel.la[-jμl.…]
Biology A long, threadlike appendage, especially a whiplike extension of certain cells or unicellular organisms that functions as an organ of locomotion.
【生物學】 鞭毛，鞭狀體：一種作為可移動器官的長的線狀附屬部分，尤指某種細胞或單細胞生物的鞭狀伸展部分
A whip.
鞭子

來源：
Latin [diminutive of] flagrum [whip]
拉丁語 [] flagrum的小后綴 [鞭子]