1. 
   Benthal
   Ben'thal adjective [ Greek ... the depth of the sea.] Relating to the deepest zone or region of the ocean.
   Found op http://www.encyclo.co.uk/webster/B/38
   
   
2. 
   Benthal
   • (a.) Relating to the deepest zone or region of the ocean.
   Found op http://thinkexist.com/dictionary/meaning/benthal/
   
   
3. 
   benthal
   benthal 1. Of or pertaining to ocean-depths exceeding 1 000 fathoms or happening on the bottom under a body of water. 2. Relating to the deepest zone or region of the ocean.
   Found op http://www.wordinfo.info/words/index/info/view_unit/2395/
   
   
4. 
   benthal
   1) Benthic 2) Benthonic 3) Biogeographical region
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/benthal/1
   
   

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