陸りく水すいりくすいMeanings1nouninland waterTechnical term for bodies of water surrounded by land, such as lakes, ponds, rivers, and marshes, as opposed to seawater.陸りく水すい学がくは湖みずうみや川かわなどの陸りく水すいを研けん究きゅうする学がく問もんです。Limnology is the study of inland waters such as lakes and rivers.