A clay-like material, containing ferric oxide, used as a pigment(noun)
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Use "red ochre" in a sentence
"The young women walked back to the Mammoth Hearth with some small mortars and pestles, and several lumps of red ochre coloring material in various shades."
"When the level prairie merged into low rolling hills, dotted with fescue and feather grass and red with the richness of iron ore -- the red ochre making it hallowed ground -- Brun knew the salt marsh was not far beyond."
"The leather had been dyed a deep brownish red, with fine-powdered red ochre mixed into the bear fat that had been used to cure the cave bear skin it was made from."