con·trac·tile /kənˈtræktḷ, ˌtaɪl/
 (a.)會縮的,有收縮性的


 con·trac·tile /kənˈtræktḷ, ˌtaɪl/ 形容詞
 (拉contractilis)收縮(性)的


 Con·tract·ile a.  tending to contract; having the power or property of contracting, 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 Zool., a pulsating cavity in the interior of a protozoan, supposed to be excretory in function. There may be one, two, or more.

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