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trainline

[treyn-lahyn]
noun
  1. a pipe or hose distributing compressed air through a train for operation of the brakes.
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Origin of trainline

Also called train·pipe [treyn-pahyp] /ˈtreɪnˌpaɪp/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018