Oleograph \O`le*o*graph\, n. [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.
[1913 Webster]
2. (Painting) A picture produced in oils by a process
analogous to that of lithographic printing.
[1913 Webster]