motility

from WordNet (r) 3.0 (2006)

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}, {motility}]

from The Collaborative International Dictionary of English v.0.48

Motility \Mo*til"i*ty\, n. [Cf. F. motilit['e].] (Physiol.)
   Capability of motion; contractility.
   [1913 Webster]