The Collaborative International Dictionary
Jinny road
Jinny road \Jin"ny road`\ [Cf. Gin an engine,
Ginnycarriage.] (Mining)
An inclined road in a coal mine, on which loaded cars descend
by gravity, drawing up empty ones.
--Knight.
Wiktionary
jinny road
n. (context mining English) An inclined road in a coal mine, on which loaded cars descend by gravity, drawing up empty ones.