Flagellum
WordNet
noun
(1) A lash-like appendage used for locomotion (e.g., in sperm cells and some bacteria and protozoa)
(2) A whip used to inflict punishment (often used for pedantic humor)
WiktionaryText
Noun
- In protists, a long, whiplike membrane-enclosed organelle used for locomotion or feeding.
- In bacteria, a long, whiplike proteinaceous appendage, used for locomotion.
- A whip