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Meaning of drying oil

dry'ing oil"

Pronunciation: [key]
  1. any of a group of oily, organic liquids occurring naturally, as linseed, soybean, or dehydrated castor oil, or synthesized, that when applied as a thin coating absorb atmospheric oxygen, forming a tough, elastic layer.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.