An inorganic dye used in histology to stain aldehyde-fixed mucopolysaccharides

Various rivers around the world

A river in northern Vietnam and Yunnan, southern China.

plural of red envelope

rouge (the cosmetic)

kermesite

(mineralogy) red copper oxide; cuprite / pure copper, as opposed to an alloy (cf. yellow copper)

Fraxinus pennsylvanica, a species of ash tree native to eastern and central North America. / Forest natal-mahogany (Trichilia dregeana)

A bright red colour, between scarlet and crimson.

An indurated clayey ochre containing iron, used by painters and artificers; reddle.