dilator Meaning, Definition & Usage

  1. noun a muscle or nerve that dilates or widens a body part
  2. noun a drug that causes dilation
  3. noun a surgical instrument that is used to dilate or distend an opening or an organ
    dilater.

WordNet

Di*lat"or noun
Etymology
See Dilate.
Definitions
  1. One who, or that which, widens or expands.
  2. (Anat.) A muscle that dilates any part.
  3. (Med.) An instrument for expanding a part; as, a urethral dilator.

Webster 1913