Definition of mud-line in US English:

mud-line

noun

  • 1The limit of wave action on a coastal seabed below which mud will settle permanently on the bottom.

  • 2Oil Industry. A pipeline carrying drilling mud.

  • 3A line of sediment flowing in a river after disturbance of the bottom.

Origin

Late 19th century. From mud + line.

Pronunciation

mud-line

/ˈmʌdlʌɪn/