This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. The state of being motile

n. The degree to which something is motile

n. Capability of motion; contractility.

n. The quality of being motile; capability of moving; capability of automatic or spontaneous motion: the opposite of stability.

n. a change of position that does not entail a change of location

n. ability to move spontaneously and independently

"Sperm, as they age, they lose what's called their motility, they just don't move as quickly as they should."

mobility   

contractility   

accessibility    advisability    availability    believability    collectibility    comparability    convertibility    credibility    culpability    deniability   

maturation    metastasis    cytotoxicity    viability    apoptosis    proliferation    reactivation    cramping    homeostasis    microbiota