from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A dilator.

from The Century Dictionary.

  • noun That which dilates; a dilator: in anatomy, specifically applied to various muscles, as of the nose or the pupil.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Anat.) A muscle which dilates any part; a dilator.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun anatomy A muscle that dilates any part; a dilator.


from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin dilatator ("propagator"), from dilato ("I spread out").


  • The unraveling began slowly with the dilatator naris anterior and dilatator naris posterior, and then moved up the nose until all the muscles on the head were spinning off into several directions at once, the ends disap - pearing into that other dimension.

    An East Wind Coming

  • It has always been easy to attribute the myotic action of these drugs, or at least, of eserin, to their stimulant action on the peripheral ends of the oculo-motor, thus causing sphincter contraction, and to a depressing action on the sympathetic fibers, thus causing removal of the action of the dilatator of the iris.

    Glaucoma A Symposium Presented at a Meeting of the Chicago Ophthalmological Society, November 17, 1913


Log in or sign up to get involved in the conversation. It's quick and easy.