Dilator

2 definitions found

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

  Dilator \Di*lat"or\, n. [See {Dilate}.]
     1. One who, or that which, widens or expands.
        [1913 Webster]
  
     2. (Anat.) A muscle that dilates any part.
        [1913 Webster]


  
     3. (Med.) An instrument for expanding a part; as, a urethral
        dilator.
        [1913 Webster]

From WordNet (r) 2.0 [wn]:

  dilator
       n 1: a muscle or nerve that dilates or widens a body part
       2: a drug that causes dilation
       3: a surgical instrument that is used to dilate or distend an
          opening or an organ [syn: {dilater}]