- a noncolored or slightly colored compound that is produced by reducing a dye and is readily oxidized to regenerate the dye.
Origin of leuco base
First recorded in 1885–90; independent use of leuco-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
- a colourless compound formed by reducing a dye so that the original dye can be regenerated by oxidation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012