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tall oil

[tahl] /tɑl/
noun
1.
a resinous secondary product resulting from the manufacture of chemical wood pulp: used in the manufacture of soaps, paints, etc.
Origin
1925-1930
1925-30; < Swedish tallolja, equivalent to tall pine (cognate with Old Norse thǫll young pine tree) + olja oil
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for tall oil

tall oil

noun
1.
any of various oily liquid mixtures obtained by acidifying the liquor resulting from the treatment of wood pulp with sodium hydroxide: it contains chiefly rosin acids and fatty acids and is used in making soaps and lubricants
Word Origin
C20: partial translation of German Tallöl, from Swedish tallolja, from tall pine + oljaoil
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for tall oil

dark, odorous liquid by-product of the sulfate (kraft) process of paper manufacture, used after refining to make coatings, sizing for paper, paint, varnish, linoleum, drying oils, emulsions, lubricants, and soaps. Tall oil is principally a mixture of resin acids, such as abietic acid, and fatty acids, such as oleic and linoleic acids, with some sterols and other compounds. It is obtained by chemically treating the cooking liquor used in the operation of pulping wood for paper.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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