pyélitecommon nounEtymologyexpandfrom the Ancient Greek puelos ('bathtub, basin') with the suffix -itis.Definition1. Inflammation of the mucous membrane lining the renal pelvis, caused either by a kidney infection or a bladder infection.médecineexpandPluralpyélitesTranslationsenglish:pyelitisSee alsobassin (cn.) bassinet (cn.)