Definition of "flagellum" []

• Biology A long, threadlike appendage, especially a whiplike extension of certain cells or unicellular organisms that functions as an organ of locomotion. (noun)
• A whip. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Of course, the flagellum is a great illustration of this."
• "That would seem to fly in the face of all the claims that the evolution of the flagellum is a problem long since solved by biologists."
• "That's why the flagellum is it's poster boy, it looks like a machine designed by a human."