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The Collaborative International Dictionary
rock oil

Naphtha \Naph"tha\ (n[a^]f"th[.a] or n[a^]p"th[.a]), n. [L. naphtha, Gr. na`fqa, fr.Ar. nafth, nifth.]

  1. (Chem.) The complex mixture of volatile, liquid, inflammable hydrocarbons, occurring naturally, and usually called crude petroleum, mineral oil, or rock oil. Specifically: That portion of the distillate obtained in the refinement of petroleum which is intermediate between the lighter gasoline and the heavier benzine, and has a specific gravity of about 0.7, -- used as a solvent for varnishes, as a carburetant, illuminant, etc.

  2. (Chem.) One of several volatile inflammable liquids obtained by the distillation of certain carbonaceous materials and resembling the naphtha from petroleum; as, Boghead naphtha, from Boghead coal (obtained at Boghead, Scotland); crude naphtha, or light oil, from coal tar; wood naphtha, from wood, etc.

    Note: This term was applied by the earlier chemical writers to a number of volatile, strong smelling, inflammable liquids, chiefly belonging to the ethers, as the sulphate, nitrate, or acetate of ethyl.

    Naphtha vitrioli [NL., naphtha of vitriol] (Old Chem.), common ethyl ether; -- formerly called sulphuric ether. See Ether.

rock oil

n. (context dated English) naphtha

rock oil

n. a dark oil consisting mainly of hydrocarbons [syn: petroleum, crude oil, crude, fossil oil]

Rock oil

Rock oil can refer to either:

  • Naphtha
  • Petroleum, which literally means "rock oil"
  • Rock oil (Scotland) - a substance gathered off sea rocks and used medicinally
Rock oil (Scotland)

Rock oil , is an ointment made from a thin film obtained on rocks by the sea, and used for a relief for burns and scalds.

It is not to be confused with petroleum which means the same.

Usage examples of "rock oil".

On a small cobbled plaza before the dome, Shar's few elderly priests had propped a huge iron dish on stone uprights, filled it with amphoras of black rock oil, and ignited the pool.

As a matter of investment, he had bought some stock in the Pennsylvania Rock Oil Company.

The well-wists aided me in making a pipe, and a way of pushing rock oil through it, as a lad shoots a bean through a straw.

She was still musing on that as she mixed the dragons' late night feed of rock oil and peat, spiked with flowers of sulphur.