mud·flat /ˈmʌdflæt/ noun [countableC usually plural]
1.DNAREAan area of muddy land that is covered by the sea when it comes up at high tide and uncovered when it goes down at low tide 〔落潮時露出、漲潮時淹沒的〕泥灘,潮泥灘
2.American EnglishAmEDN the muddy bottom of a drylake 〔湖泊幹涸後的〕泥床,泥底