red oxide

noun2

1. •
   ferric oxide (Fe₂O₃)
2. •
   A brownish red colour, often of paint.

   • Almost all wagon stock is painted red oxide, except for the B.S.R., N.S.R., and S.I.R., whose wagons are black, and the American and Canadian-built "WD" stock, which is painted olive-green. — 1950