whale oil, or, formerly, oil from seals, codfish, etc.
Origin of train oilearlier trane ; from Middle Dutch traen, akin to German träne, a tear: basic sense “exuded oil”
Oil obtained from the blubber of a whale or other marine animal.
Origin of train oilMiddle English trane, from Middle Dutch, tear, drop, train oil; see dakru- in Indo-European roots.
(countable and uncountable, plural train oils)