Etymology
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paracentesis (n.)

"surgical perforation of a cavity of the body for the purpose of evacuation of effused fluid," 1590s, from the medical Latin form of Greek parakentēsis "perforation," from parakentein "to tap," literally "to pierce at the side," from para- "beside" (see para- (1)) + kentein "to prick, stab" (see center (n.)).

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Definitions of paracentesis

paracentesis (n.)
centesis of the belly to remove fluid for diagnosis;
Synonyms: abdominocentesis
From wordnet.princeton.edu