Hypertext Webster Gateway: "Dilator"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Dilator \Di*lat"or\, n. [See {Dilate}.]
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.
From WordNet (r) 1.7 (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}]
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