daguerreotypeEnglishOxford Dictionary of Englishdaguerreotype /dəˈɡɛrə(ʊ)tʌɪp , dəˈɡɛːrə(ʊ)tʌɪp / (also daguerrotype) ▸ noun a photograph taken by an early photographic process employing an iodine-sensitized silvered plate and mercury vapour. – ORIGIN mid 19th century: from French daguerréotype, named after L.-J.-M. Daguerre (see Daguerre, Louis).