Source : Webster's Revised Unabridged Dictionary (1913)

Motility \Mo*til"i*ty\, n. [Cf. F. motilit['e].] (Physiol.)
   Capability of motion; contractility.

Source : WordNet®

motility
     n 1: ability to move spontaneously and independently [ant: {immotility}]
     2: a change of position that does not entail a change of
        location; "the reflex motion of his eyebrows revealed his
        surprise"; "movement is a sign of life"; "an impatient
        move of his hand"; "gastrointestinal motility" [syn: {motion},
         {movement}, {move}]