1. 
   Tetractinellida
   Te·trac`ti·nel'li·da noun plural [ New Latin , from Greek te`tra- tetra- + ..., ..., ray, spoke.] (Zoology) A division of Spongiæ in which the spicules are siliceous and have four branches diverging at right angles. Called also...
   Found op http://www.encyclo.co.uk/webster/T/34
   
   
2. 
   tetractinellida
   <zoology> A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. ... Synonym: Tetractinellinae. ... Origin: NL, from Gr. Tetra- +, ray, spoke. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?tetractinellida
   
   
3. 
   Tetractinellida
   • (n. pl.) A division of Spongiae in which the spicules are siliceous and have four branches diverging at right angles. Called also Tetractinellinae.
   Found op http://thinkexist.com/dictionary/meaning/tetractinellida/
   
   

Tip: double click on a word to show its meaning.