Excretion of considerable amounts of histidine in the urine; frequently observed in later months of pregnancy, and in histidinaemia. ... (05 Mar 2000) ... 
(his″tĭ-dĭ-nu´re-ә) an aminoaciduria consisting of excessive histidine in the urine, usually in either histidinemia or during pregnancy.
Type: Term Pronunciation: his′ti-di-nyū′rē-ă Definitions: 1. Excretion of considerable amounts of histidine in the urine; frequently observed in later months of pregnancy, and in histidinemia.
histidinuria The excessive urinary excretion of histidine, a condition which is a feature of histidinemia.