train oil definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
whale oil, or, formerly, oil from seals, codfish, etc.
Origin: earlier trane ; from Middle Dutch traen, akin to German träne, a tear: basic sense “exuded oil”
train oil definition by American Heritage Dictionary
Oil obtained from the blubber of a whale or other marine animal.
Origin: Middle English trane, from Middle Dutch, tear, drop, train oil; see dakru- in Indo-European roots.