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

  • noun A tubular instrument equipped with a light and used to examine the interior of the urinary bladder and ureter.

from The Century Dictionary.

  • noun A hollow tube illuminated by an electric light, employed to bring into view the interior of the bladder.

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

  • noun A form of endoscope used to examine the ureter and the bladder.


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  • He knew it took more than a decade of exposure to dye chemicals for humans to develop bladder cancer, so he thought that animal tests should last for several years at least—especially since both Yamagiwa and Kennaway had exposed animals to carcinogens for more than a year before seeing tumors. In his new lab, Hueper set up a much more thorough experiment in which sixteen female dogs, large enough to have their bladders checked with a cystoscope, would be given BNA with their daily chow. The dogs would be monitored at least two years, twice as long as previous experiments.
    Dan Fagin, Toms River: A Story of Science and Salvation (New York: Bantam Books, 2014), p. 182
    twenty months into his dog experiment, cystoscope examinations showed that many of them were developing tumors in their bladders.
    Id., p. 183

    Wendel then did what he always did in such cases: He performed a cystoscopy, an uncomfortable procedure in which a thin tube equipped with lenses is inserted into the urethra.
    Id., p. 208.

    February 7, 2016