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ortho-dichlorobenzene

[awr-thuh-dahy-klawr-uh-ben-zeen, -ben-zeen, -klohr-]
noun Chemistry.
  1. a colorless liquid with a pleasant odor, C6H4Cl2, used as a solvent for a wide range of organic materials.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018