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undersaturated

[uhn-der-sach-uh-rey-tid]
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adjective Chemistry.
  1. unsaturated(def 2).
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Origin of undersaturated

First recorded in 1820–30; under- + saturated
Related formsun·der·sat·u·ra·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for undersaturated

undersaturated

adjective
  1. (of an igneous rock) having a low silica content
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012