instrument for measuring amount of oil in a substance
• (n.) An instrument for ascertaining the weight and purity of oil; an elaiometer.
O`le·om`e·ter noun [ Latin oleum oil + -meter .] (Chemistry) An instrument for ascertaining the weight and purity of oil; an elaiometer. 
Type: Term Pronunciation: ō′lē-om′ĕ-tĕr Definitions: 1. An instrument, similar to a hydrometer, for determining the specific gravity of oils. Synonyms: eleometer
oleometer 1. A hydrometer used to determine the specific gravity of oils, or calibrated in the range of specific gravity of oils. 2. An apparatus for determining the content of oil in a material.