[{"Bold_text": "noun", "List Items": ["a small, black-tipped, fatty mass in a skin follicle, especially of the face; comedo.", "any of several birds having a head is black ,as the greater scaup,Aythya marila.", "Also called enterohepatitis .Veterinary Pathology.a malignant, infectious disease of turkeys, chickens, and many wild birds, caused by a protozoan parasite,Histomonas meleagridas,attacking especially the intestines and liver, and often characterized by a darkening of the skin on the head."]}]