ziatype
n.— «Kersey uses several processes for printing his pictures, from traditional silver gelatin prints to a mysterious, little-known technique called a ziatype. Named after the Native American word zia, meaning “sun,” these exquisite, hand-coated art paper prints are created by exposure to sunlight and made visible by little more than immersion in water, followed by a brief chemical bath.» —“From the mean streets to silent meadows” by Robert McFarlane Sydney Morning Herald May 17, 2005. (source: Double-Tongued Dictionary)