obsolete train train oil, from Middle English trane, from Middle Dutch trane or Middle Low German trān; akin to Old High German trahan tear
15th century, in the meaning defined above
train of thought
train oil
train order
“Train oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/train%20oil. Accessed 25 Dec. 2024.
Britannica.com: Encyclopedia article about train oil
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