tall oil

  1. a resinous secondary product resulting from the manufacture of chemical wood pulp: used in the manufacture of soaps, paints, etc.

Origin of tall oil

1925–30; < Swedish tallolja, equivalent to tall pine (cognate with Old Norse thǫll young pine tree) + olja oil
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British Dictionary definitions for tall oil

tall oil

  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 for tall oil

C20: partial translation of German Tallöl, from Swedish tallolja, from tall pine + olja oil
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