Definition of flagellum in English:

flagellum

noun

Biology
  • A slender thread-like structure, especially a microscopic whip-like appendage which enables many protozoa, bacteria, spermatozoa, etc. to swim.

    • ‘The single flagellum provides the bacteria with mobility and kinetic activity.’
    • ‘Development of the spermatid flagellum begins immediately after meiosis.’
    • ‘Cilia and flagella are hairlike organelles extending from the cell surface.’
    • ‘This study was designed to learn how well the flagella of groups of bacteria might move fluid in a microscopic environment.’
    • ‘A third group of bacteria has many flagella surrounding the cell.’

Origin

Early 19th century (denoting a whip or scourge): from Latin, diminutive of flagrum scourge.

Pronunciation:

flagellum

/fləˈdʒɛləm/