Oil pastel definitions

Oil pastel

1) Art material
Found on https://www.crosswordclues.com/clue/oil-pastel

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oil pastel

(from the article `painting`) Oil pastels are pigments ground in mastic with oil of turpentine, spermaceti, and poppy oil. They are used in a similar way to that of French pastels ...
Found on http://www.britannica.com/eb/a-z/o/10

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