catopter

plural catopters

1. obsoleteA reflecting optical glass or instrument; a mirror.

   Then on a catopter MSD the vacuum ion-beam deposition of aluminium (hAl = 0,5 microns) was carried out.

   2002, AD Bialik, IA Voronin, AM Zlobin, “Temperature dependences of fibre-optical sensors of mechanical values”, in Proceedings. 3rd Annual Siberian Russian Workshop on Electron Devices and Materials (EDM)

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   My Cat whose black fur was so glossy and fine Her use of Catharon one well could divine. Almost indeed a Catopter she showed.

   1885, C.M. Van Wagenen, A Catagraph

   For example, at research of an interference electromagnetic field near to a catopter on the metered reflectivity it is possible to define a permittivity and width of a dielectric slice.

   2000, Siberian Russian Student Workshops on Electron Devices and Materials, page 72

2. A unit of measure of the converging power of a curved mirror, equal to the reciprocal of the focal length in meters; a diopter applied to a curved reflective surface as opposed to a lens.

   This focus divided into 40", gives the catopters.

   1916, James John Lewis, State Board Examinations: Questions and Answers, page 41

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   A catopter mirror will reflect parallel rays of light to a focus at a distance of one meter or 40 inches.

   1923, Eric G. Tavs, Questions and Answers in Optometry, page 23

   The converging or diverging power of a mirror is expressed in terms of a catopter.

   1934, Alf Henry Johnsen, Bertram A. Weeks, Frederick H. Weller, The Optical Shop and Counter, page 19

3. An Ancient Greek anal dilator or speculum.

   In the course of excavations undertaken in Pompei, such catopters had been found in "the house of surgeons".

   1972, S. Drobni, M. Fehér, Recent Progress in the Study of Disorders of the Colon and Rectum, page 102

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   Hippocrates (B.C. 432) described an instrument, the catopter, which was undoubtedly used as an anal speculum,

   1897, W.L Reid, “President's Address: The History, Forms, and Theories of the Vaginal Speculum”, in Transactions of the Royal Medico-Chirurgical Society of Glasgow, volume 1, page 119

   Hippocrates' treatise on fistulas clearly mentions this technique, and later, Galen's Levicom refers to the catopter which is an anal speculum.

   2013, Michael E. Moran, Urolithiasis: A Comprehensive History, page 246

   the catopter, which is called the anal dilator, in the same way as the diopter is called the female dilator.

   2020, Maria Gerolemou, Lilia Diamantopoulou, Mirrors and Mirroring from Antiquity to the Early Modern Period