American Heritage® Dictionary of the English Language, Fourth Edition
- n. An aqueous solution of copper sulfate, sodium hydroxide, and potassium sodium tartrate used to test for the presence of sugars and aldehydes in a substance, such as urine.
- n. chemistry an alkaline solution of copper sulphate which changes from blue to red in the presence of an aldehyde or a reducing sugar
GNU Webster's 1913
- n. (Chem.) a standardized solution of cupric hydrate in sodium potassium tartrate, used as a means of determining the reducing power of certain sugars and sirups by the amount of red cuprous oxide thrown down.
- n. a liquid solution of copper sulfate and potassium tartrate and sodium hydroxide that is used to test for sugar in the urine; solution turns reddish when sugar is present
- From Hermann von Fehling, German chemist. (Wiktionary)
- After Hermann von Fehling (1812-1885), German chemist. (American Heritage® Dictionary of the English Language, Fourth Edition)
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