- black|head «BLAK HEHD», noun.1. a small, black-tipped lump of dead cells and oil plugging a pore of the skin; comedo.2. any of various birds that have a black head.3. Often, blackhead disease. an acute infectious disease of the intestines and liver of turkeys, chickens, and other fowl, caused by a protozoan parasite.
Useful english dictionary. 2012.