eth·i·on (ĕth'ē-ŏn')
n.
A highly toxic, liquid organophosphate pesticide, C₉H₂₂O₄P₂S₃.

[ETH(YL) + (TH)ION-.]

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The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

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