n 1  pl  -dia   a  :  a motile multinucleate mass of protoplasm resulting from fusion of uninucleate ameboid cells : also  :  an organism (as a stage of a slime mold) that consists of such a structure  b  :  SYNCYTIUM 1  2 a  cap  :  the type genus of the family Plasmodiidae of sporozoans that includes all the malaria parasites affecting humans  b  pl  -dia  :  any individual malaria parasite .
 
 
 
Similar sounding terms:  plas·mot·o·my 
 
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