sar·co·cyst 'sär-kə-.sist n SARCOCYSTIS (2) specif the large intramuscular cyst of a protozoan of the genus Sarcocystis
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sar·co·cyst (sahrґko-sist) [sarco- + cyst] 1. a protozoan of the genus Sarcocystis. 2. one of the elongated, cylindrical, membrane-bound hyaline bodies of the protozoan Sarcocystis, containing the trophozoites known as Rainey corpuscles; they are found in the muscles of individuals with sarcocystosis.Medical dictionary. 2011.