We don't have synonyms for red oil yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are red soil and red owl.
(N) :
defined as a substance of varying composition formed when an organic solution, typically tri-n-butyl phosphate (TBP, an agent used for extracting heavy metals in nuclear reprocessing plants) and its diluent, comes in contact with concentrated nitric acid at a temperature above 120 °C.
(N) :
defined as a substance of varying composition formed when an organic solution, typically tri-n-butyl phosphate (TBP, an agent used for extracting heavy metals in nuclear reprocessing plants) and its diluent, comes in contact with concentrated nitric acid at a temperature above 120 °C.