spring-rail frog

noun

: a frog having a movable wing rail held against the point rail by springs and normally presenting an unbroken running surface to wheels using the main track but operating also to permit the passage of trailing wheels from a diverging track

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Dictionary Entries Near spring-rail frog

Cite this Entry

“Spring-rail frog.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spring-rail%20frog. Accessed 22 Jun. 2024.

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