1. 
   sigmatism
   Synonym: lisping. ... Origin: G. Sigma, the letter S ... (05 Mar 2000) ...
   Found op http://www.mondofacto.com/facts/dictionary?sigmatism
   
   
2. 
   sigmatism
   (sig´mә-tiz-әm) faulty enunciation or too frequent use of s sounds; see also lisping.
   Found op http://www.encyclo.co.uk/local/21001
   
   
3. 
   sigmatism
   sigmatism Incorrect, difficult, or the too frequent use of the 's' sound.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1958/
   
   
4. 
   sigmatism
   Type: Term Pronunciation: sig′mă-tizm Synonyms: lisping
   Found op http://www.medilexicon.com/medicaldictionary.php?t=81785
   
   

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