[1] : The Collaborative International Dictionary of English v.0.48

contractile \contract"ile\, a. cf. f. contractile.
   tending to contract; having the power or property of
   contracting, or of shrinking into shorter or smaller
   dimensions; as, the contractile tissues.
   1913 webster

         the heart's contractile force.           --h. brooke.
   1913 webster

         each cilium seems to be composed of contractile
         substance.                               --hixley.
   1913 webster

   contractile vacuole zool., a pulsating cavity in the
      interior of a protozoan, supposed to be excretory in
      function. there may be one, two, or more.
      1913 webster
see also:
contractile vacuole 

[2] : WordNet (r) 2.0

contractile
     adj : capable of contracting or being contracted; "the contractile
           wings of an insect"

Contractile >> C Words
Contractile, definition of term: Contractile
contractile_pag1.html

Contractile Vac >> C Words
Contractile Vac, definition of term: Contractile Vac
contractile+vac_pag1.html