1. 
   Cystid
   Cys'tid noun (Zoology) One of the Cystidea.
   Found op http://www.encyclo.co.uk/webster/C/211
   
   
2. 
   Cystid
   • (n.) One of the Cystidea.
   Found op http://thinkexist.com/dictionary/meaning/cystid/
   
   
3. 
   cystid
   (from the article `moss animal`) ...the colony are found at its outer edges. Cells from the surface epithelium push inward to produce the polypide, and the septa create a chamber ...
   Found op http://www.britannica.com/eb/a-z/c/176
   
   

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