1. the inner bark of the black oak tree, used as a source of yellow dye and tannin
Usage: technical; historical

Examples

• The textile mill imported quercitrons from America for dyeing fabrics.
• Quercitrons were once a valuable export commodity from the eastern United States.
• The yellow dye extracted from quercitrons was prized by European manufacturers.
• Colonial merchants shipped quercitrons to England for the growing textile industry.
• The tanning properties of quercitrons made them useful in leather production.