Motility (noun)

The ability of an organism or cell to move spontaneously and actively, especially by means of muscular contraction.

Origin:

Early 19th century: from french motilité, from latin motus, past participle of movere 'to move'.

Examples:

1. The motility of the sperm cells was tested in the laboratory.
2. Motility is an important factor in the success of fertilization.
3. Some bacteria have a flagellum, which is used for motility.
4. The motility of the muscles is regulated by the nervous system.
5. The motility of cells is essential for processes such as migration, invasion and dissemination.