The Collaborative International Dictionary
Tithonographic
Tithonographic \Ti*thon`o*graph"ic\, a. [Tithonic + -graph + -ic.] Of, relating to, or produced by, the chemical action of rays of light; photographic.
Wiktionary
tithonographic
a. (context dated English) Of, relating to, or produced by the chemical action of rays of light; photographic.