noun
red lead; minium; lead(II,IV) oxide
A bright red or orange-red lead oxide used historically as a pigment and in rust-proof paints. Technical term in chemistry.
鉛丹は、かつて防錆塗料の顔料として広く使われていた。
Red lead was once widely used as a pigment in anti-corrosion paints.
化学の授業で、鉛丹の化学式はPb₃O₄だと習
In chemistry class, I learned that the chemical formula of red lead is Pb₃O₄.