noun[mass noun] Chemistry
A crystalline organic compound with an unpleasant odour, present in coal tar and in faeces.
- For instance, the substance indole, which comes from coal tar and animal feces, actually smells like jasmine at its detection threshold.
- The absorbance band is narrowest for 3-methyl indole in pentane.
- Members of the family produce latex, diverse iridoids, cardioglycosides, and various alkaloids (notably indole and steroid groups), sometimes cyanogenic, rarely saponiferous.
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