Definify.com
Webster 1913 Edition
Oleograph
Oˊle-o-graph
,Noun.
[L.
oleum
oil + -graph
.] 1.
(Chem.)
The form or figure assumed by a drop of oil when placed upon water or some other liquid with which it does not mix.
2.
(Painting)
A picture produced in oils by a process analogous to that of lithographic printing.