Definition of crosstie in English:

crosstie

noun

US
  • A wooden or concrete beam laid transversely under the rails of a railroad track to support it.

    • ‘He hammered a silver spike into a railroad crosstie.’
    • ‘The organization promotes the economical and environmentally sound use of wood crossties.’
    • ‘He argues that tests on household plants growing next to old crossties found no creosote residue.’

Pronunciation:

crosstie

/ˈkrôstī/