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oil-colour

ˈoil-ˌcolour
  ‘Colour’ or paint made by grinding a pigment in oil. (Chiefly in pl.)

1539 Ld. Treas. Acc. Scotl. in Pitcairn Crim. Trials I. 298* Painting of hir mastis, salis, and airis, with oley colouris. 1659 Wood Life (O.H.S.) I. 309 They were all painted over in oyl-colours this yeare (1659). 1703 Moxon Mech. Exerc. 349 Draw upon these marked Lines with Oyl Colours. 1821 Craig Lect. Drawing i. 33 In the time of those three great men, the practice of painting in oil colours became general.

Oxford English Dictionary

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