DuckCorp Dico

Found one definition

1.                 From Japanese-English FreeDict Dictionary ver. 0.1:
                   
   
   
                   
                     
   纜 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 艫綱 /(en)tʃˈaɪniːz(ja)lˈe̞tə (en)tʃˈaɪniːz(ja)lˈe̞tə/, ともづな /tˌo̞mo̞zˈɯᵝnä/
   (noun (common) (futsuumeishi))
   stern line, mooring line