Contractile

[Sarah]

tending to contract; having the power or property ofcontracting, or of shrinking into shorter or smaller dimensions; as,the contractile tissues.The heart's contractile force. H. Brooke.Each cilium seems to be composed of contractile substance. Hixley.Contractile vacuole (Zoöl.), a pulsating cavity in the interior of aprotozoan, supposed to be excretory in function. There may be one,two, or more.

[Julene]

used to refer to body tissue that is able to contract, or to something that causes this to happen

[Kai]

Capable of or producing contraction.