ballast pocket
noun Railroads.
a depression that is formed beneath the ballast layer by penetration of ballast particles into the subgrade and that tends to collect moisture.
Words nearby ballast pocket
ballard,
ballardian,
ballas,
ballast,
ballast line,
ballast pocket,
ballast resistor,
ballata,
ballbreaker,
balled-and-burlapped,
ballerina