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 There are 2 twelve-letter words beginning with SIPHO| SIPHONOPHORE | • siphonophore n. (Zoology) Any of various transparent marine hydrozoans, of the order Siphonophorae, that float or swim… • SIPHONOPHORE n. a marine creature, colonial in habit. |  | SIPHONOSTELE | • siphonostele n. (Botany) A type of stele in which the vascular tissue in the stem forms a cylinder surrounding a central… • SIPHONOSTELE n. the cylinder of conducting tissue surrounding a central core of pith in certain stems. |  
 Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America. Definitions are short excerpt from the WikWik.org and 1Word.ws. 
 See this list for:- English Wiktionary: 10 words
 - Scrabble in French: 13 words
 - Scrabble in Spanish: no word
 - Scrabble in Italian: no word
 - Scrabble in German: no word
 - Scrabble in Romanian: no word
 
 
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