mars yellow

noun

Etymology: from mars (iron)

1. usually capitalized M : an iron yellow artist's pigment made usually by precipitating an iron salt with alkali and heating the product

2. often capitalized M : a moderate to strong orange that is yellower and darker than carrot red and darker than zinc orange or sunburst — called also iron yellow, siderin yellow

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1. a medium to deep orange-yellow color.

2. a yellow pigment used in painting, artificially made from an iron hydroxide base and characterized by strong film-forming properties and permanence.