rollbock

Etymology

From German Rolle (“roll”) + Bock (“buck”); the term originated in Switzerland in the early 1880s.

rollbock means A bogie used to carry a railway carriage on a line of different gauge to the one it was built for, usually a narrower gauge. Lexicurio rates it Sui generis — a strength score of 93 out of 100.

noun

A bogie used to carry a railway carriage on a line of different gauge to the one it was built for, usually a narrower gauge.