Red ocherous iron ore, used in dyeing and marking.
To dye or mark with or as if with red ocher.
To color or mark with red ocher, esp. to mark sheep thus.
To cause to flush; redden.
To mark something with red ochre.
Origin of ruddle
- Probably diminutive of rud red from Middle English rudde from Old English rudu reudh- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition