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undercutter

American  
[uhn-der-kuht-er] / ˈʌn dərˌkʌt ər /

noun

Railroads.

  1. a track-maintenance machine that cleans the ballast section to any predetermined depth.

Etymology

Origin of undercutter

First recorded in 1890–95; undercut + -er 1

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.