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Definitions

from The Century Dictionary and Cyclopedia

  • n. An oily product which is given off in large quantity in the destructive distillation of bituminous shale. The lighter oils are used for illuminating, and the heavier for lubricating purposes.
  • n. In petroleum-refining, this term is specifically applied to the heavy oils of high boiling-point, used for lubrication, or from which paraffin scale may be made.

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