Red ocherous iron ore, used in dyeing and marking.(noun)
To dye or mark with or as if with red ocher: ruddle sheep. (verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "ruddle" in a sentence
"There are those who think that remodelled waists and new caps had better be kept to the towns; but such people, if they would follow out their own argument, would wish to see plough-boys painted with ruddle and milkmaids covered with skins."
"It was extracted from ruddle (red ochre) and limonite"
""Your worship," replied Sancho, "had better mark it with ruddle, like the inscriptions on the walls of class rooms, that those who see it may see it plain.""