+A cilium (plural: cilia) is a slender, hair-like [organelle](/wiki/Organelle) projecting from the surface of an [eukaryotic cell](/wiki/Eukaryotic_cell). These tiny cellular antennae are vital for sensing the environment, cell signaling, and, in some cases, movement.
+## See also
+- [Flagellum](/wiki/Flagellum)
+- [Cell Biology](/wiki/Cell_Biology)
+- [Microtubule](/wiki/Microtubule)
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