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pericystium

noun
peri·​cys·​ti·​um | \ ˌperəˈsistēəm\
plural pericystia\ -​ēə \

Definition of pericystium 

: the vascular and connective tissues surrounding a cyst or bladder

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History and Etymology for pericystium

New Latin, from peri- + cyst- + -ium

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