flat-bottomed rail
noun
railways
a rail having a cross section like an inverted T, with the top extremity enlarged slightly to form the head
Also called: flanged rail
Words nearby flat-bottomed rail
flat-bed lorry,
flat-bed plotter,
flat-bed press,
flat-bed scanner,
flat-bottomed,
flat-bottomed rail,
flat-coated retriever,
flat-earther,
flat-felled seam,
flat-file,
flat-footed