|zan(t)th(y)ə|renik- noun
Etymology: xanth- + -urenic (as in kynurenic )
: a yellow crystalline phenolic acid (HO) 2 C 9 H 4 NCOOH closely related to kynurenic acid and excreted in the urine when tryptophan is added to the diet of experimental animals deficient in pyridoxine; 4,8-dihydroxy-quinaldic acid