Definitions
from The Century Dictionary.
- noun A crystalline monosaccharide, C6H12O6, occurring in oak-bark. It is obtained from the mother-liquors of quercite. It is optically inactive and melts at 340° C.
- noun A variety of tannic acid, C15H12O9 + 2H2O, found in oak-bark. It is a light-brown hygroscopic powder. Also called
quercic acid . - noun A bitter crystalline compound found in oak-bark.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry A form of
tannic acid extracted from acorns and oak-bark.
Etymologies
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Examples
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The active ingredients are quercin, a natural aspirin and tannin, a natural astringent and important ingredient in tea.
Recently Uploaded Slideshows JoeFarmer 2009
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-- “It hath beene of later experience found also to be effectual against the falling sicknesse, that divers have been cured thereby; for after the taking of the _Decoct.manipulor. ii.c. polypod.quercin. contus. ℥ iv. in cerevisia_, they that have been troubled with it twenty-six years, and have fallen once in a weeke, or two or three times in a moneth, have not fallen once in fourteen or fifteen moneths, that is until the writing hereof.”
An Account of the Foxglove and some of its Medical Uses With Practical Remarks on Dropsy and Other Diseases William Withering 1770
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