Constantin Dmitrievich Perskyi (Константин Дмитриевич Перский) (2 June 1854 – 5 April 1906) was a Russian scientist who is credited with coining the word television ("télévision") in a paper that he presented in French at the 1st International Congress of Electricity, which ran from 18 to 25 August 1900 during the International World Fair in Paris. At the time, he was Professor of Electricity at the Artillery Academy of Saint Petersburg. His paper referred to the work of other experimenters in the field, including Paul Gottlieb Nipkow and Porfiry Ivanovich Bakhmetiev, who were attempting to use the photoelectric properties of selenium as the basis for their research in the field of image transmission.