Dictionary
di•la•tor
Pronunciation: (dī-lā'tur, di-, dī'lā-), [key]—
n.
1. Anat.a muscle that dilates some cavity of the body.
2. Surg.an instrument for dilating body canals, orifices, or cavities.
Also,di•lat'er.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.