mignon lamp

mi·gnon lamp

a minute electric light used in various endoscopic instruments.
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References in periodicals archive ?
The light at the end of the scope: The history of Electro Surgical Instruments Co and the mignon lamp
Methods: Literature review was performed on topics related to the development and impact of the mignon lamp within urology.
Henry Koch, a urologist and Charles Preston, an electrician, from Rochester, NY, modified the Edison bulb to a smaller size and amperage suitable for medical devices and the mignon lamp was born.