D defs.my
Entry 2 senses Webster, 1913

Oleograph

· O·le·o·graph · IPA
01 n. The form or figure assumed by a drop of oil when placed upon water or some other liquid with which it does not mix.
  1. 1.
    The form or figure assumed by a drop of oil when placed upon water or some other liquid with which it does not mix.(Chem.)
  2. 2.
    A picture produced in oils by a process analogous to that of lithographic printing.(Painting)