Medical Dictionary

blackhead

noun black·head \ˈblak-ˌhed\

Definition of BLACKHEAD

1
:  a small plug of sebum blocking the duct of a sebaceous gland especially on the face—compare milium
2
:  a destructive disease of turkeys and related birds caused by a protozoan of the genus Histomonas (H. meleagridis) that invades the intestinal ceca and liver—called also enterohepatitis, histomoniasis, infectious enterohepatitis
March 27, 2015
quiescent Hear it
Tranquilly at rest or causing no trouble
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears