Red lead is typically known as lead tetroxide, a bright red-orange pigment used in industrial applications. Some common synonyms for red lead include minium, orange lead, and saturnine. Minium is a common name in the paint industry and is derived from the Latin name, "minimum." Orange lead is used to describe the bright orange-red color of the pigment. Saturnine, on the other hand, is derived from the planet Saturn, the Roman god of agriculture, and is used to describe the metallic nature of the pigment. It's also worth mentioning that variations of red lead exist, such as dark red lead and brownish-red lead.