noun[mass noun] Chemistry
A red crystalline compound used in the manufacture of dyes.
- An indole derivative; chemical formula: C8H5NO2.
- Some of the major known ingredients of the root not listed above include indoxyl-beta-glucoside, beta-sitosterol, and isatin.
Mid 19th century: from Latin isatis 'woad' (from Greek) + -in1.
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