|pərpyə(ˌ)rō+ noun
Etymology: Latin purpura + International Scientific Vocabulary -o- + xanthin
: a reddish yellow crystalline compound C 14 H 6 O 2 (OH) 2 obtained from madder root or by reduction of purpurin; 1,3-dihydroxy-anthraquinone — called also xanthopurpurin