from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Causing dilatation of the pupils.
  • n. A mydriatic drug.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. that dilates the pupils of the eyes
  • n. A drug having this effect

from the GNU version of the Collaborative International Dictionary of English

  • adj. Causing dilatation of the pupil.

from The Century Dictionary and Cyclopedia

  • Pertaining to or causing mydriasis.
  • n. A drug which causes mydriasis.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a drug that causes the pupil of the eye to dilate; used to aid eye examinations


from The American Heritage® Dictionary of the English Language, 4th Edition

From mydriasis.


  • With one-touch, the operator can automatically switch between mydriatic and non-mydriatic modes, effortlessly utilizing different functions within seconds and performing several concurrent ocular tests.

    October 2009 -

  • Its clinical uses are primarily as a sedative, and applied locally (directly) as a mydriatic, which causes the pupil of the eye to dilate.

    Torture, Interrogation, and Intelligence

  • D. stramonium seeds contain about 0.2% of mydriatic alkaloids and about 15-30% of fixed oils.

    Chapter 7

  • I should fancy that the above particulars are sufficent to completely differentiate atropine from all the other mydriatic alkaloids.

    Scientific American Supplement, No. 324, March 18, 1882

  • According to the early researches we could not discover any of these relationships which only become evident when we come to study the new discoveries which have been made in connection with the tropines, to which class belong both duboisine and hyoscyamine, which, although differing from atropine, are equally mydriatic in their action.

    Scientific American Supplement, No. 324, March 18, 1882

  • That is one of the effects of the mydriatic alkaloids, of which this is one.

    The Treasure-Train

  • "They are all like atropine, mydriatic alkaloids," he proceeded,

    Gold of the Gods

  • As we entered he was verifying his experiments and checking over his results, carefully endeavouring to isolate any of the other closely related mydriatic alkaloids that might be contained in the noxious fumes of the poisoned tobacco.

    Gold of the Gods

  • Most recently, we began marketing a non-mydriatic imaging module that enables a physician to capture retinal images without the need to dilate a patient's eye, improving patient comfort and physician efficiency.


  • The CX-1 Hybrid Mydriatic/Non-Mydriatic Digital Retinal Camera is Canon's first fully hybrid digital retinal camera with both mydriatic and non-mydriatic modes.

    Medlogs - Recent stories


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  • "Dr. Willcox mixed a bit of his alkaloid extract into a solution and, with the help of an assistant, placed a couple of droplets into the cat's eye. Moments later the cat's pupil expanded to many times its ordinary size. This was an important clue, for it meant the substance he had isolated was mydriatic, that is, it had the power to dilate pupils. He knew of only four alkaloidal poisons with that power: cocaine, atropine, and two derivatives of henbane, hyoscyamine and hyoscine.

    He shined a bright light directly into the cat's eyes and found that the pupil held its new diameter. This allowed him to rule out cocaine, because its mydriatic powers were less pronounced."

    —Erik Larson, Thunderstruck (New York: Crown Publishers, 2006), 32

    More on prussic acid and Stas extraction method.

    July 7, 2009