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 There are 4 thirteen-letter words beginning with SIPHONO| SIPHONOGAMIES | • SIPHONOGAMY n. the state of reproducing by seed. |  | SIPHONOPHORES | • siphonophores n. Plural of siphonophore. • SIPHONOPHORE n. a marine creature, colonial in habit. |  | SIPHONOSTELES | • siphonosteles n. Plural of siphonostele. • SIPHONOSTELE n. the cylinder of conducting tissue surrounding a central core of pith in certain stems. |  | SIPHONOSTELIC | • siphonostelic adj. Relating to a siphonostele. • SIPHONOSTELIC adj. of or like a siphonostele, 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 1Word.ws and WikWik.org. 
 See this list for:- English Wiktionary: 9 words
 - Scrabble in French: 2 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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