† oleometern.
Obsolete.
An instrument for determining the density, and so the purity, of oils.
ΘΚΠ
the world > matter > constitution of matter > oiliness or greasiness > [noun] > oiliness > contrivance for testing or measuring
oleometer1836
oil test1854
oil tester1855
oilometer1860
1836 Laws of New-York cdlxxv. 720 It shall be the duty of the secretary of state, to furnish..to the clerk of each county, a correct oleometer, graduated so as to shew the difference between pure sperm oil and whale oil.
1861 R. T. Hulme tr. C. H. Moquin-Tandon Elements Med. Zool. ii. iii. i. 105 Cod-liver oil..should stand at 392° of Lefebvre's oleometer.
1866–77 H. Watts Dict. Chem. IV. 181 Lefebvre..has constructed..a hydrometer of peculiar construction, called an oleometer, having a very large cylindrical bulb and a very long stem, on which are inscribed densities from 0·8 to 0·94 for the temperature 15°, each density corresponding to that of a commercial oil.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online June 2018).
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n.1836