ˈmärsh(ē)əs- noun
Etymology: after Karl A. Martius died 1920 German chemist
1. usually capitalized M , often capitalized Y : a yellow dye that is a salt of a dinitro-alpha-naphthol and is used chiefly as a biological stain
2. often capitalized M : a light greenish yellow that is redder and paler than sulphur yellow (sense 2)