daguerreotype
Concise Oxford English Dictionary © 2008 Oxford University Press:
daguerreotype /dəˈgɛrətʌɪp/ (also daguerrotype)
▶noun a photograph taken by an early photographic process employing an iodine-sensitized silvered plate and mercury vapour.
– origin C19: from Fr. daguerréotype, named after L.-J.-M. Daguerre, its French inventor.
'daguerreotype' also found in these Oxford entries:

