1. Muscle or nerve that causes an opening or enlargement of a structure in the body. 2. Instrument for opening a body orifice. 3. Drug that causes dilation or opening. See vasodilator.

DILATOR: "Joe had dilator put in his eyes so the opthamologist could see into his eyes."
Cite this page: N., Pam M.S., "DILATOR," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/dilator/ (accessed August 8, 2020).