1. 
   Hypnum
   Hyp'num noun [ New Latin , from Greek ... moss.] (Botany) The largest genus of true mosses; feather moss.
   Found op http://www.encyclo.co.uk/webster/H/82
   
   
2. 
   hypnum
   <botany> The largest genus of true mosses; feather moss. ... Origin: NL, fr. Gr. Moss. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?hypnum
   
   
3. 
   Hypnum
   • (n.) The largest genus of true mosses; feather moss.
   Found op http://thinkexist.com/dictionary/meaning/hypnum/
   
   
4. 
   Hypnum
   Hypnum is one of the largest genera of mosses, including above ninety species, natives of Britain. Many of the species are very large and ornamental.
   Found op http://www.probertencyclopaedia.com/browse/BH.HTM
   
   

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