Dictionary
head' smut"
Plant Pathol.
a disease of cereals and other grasses, characterized by a dark-brown, powdery mass of spores replacing the affected seed heads, caused by any of several smut fungi of the genera
Sorosporium, Sphacelotheca, and
Ustilago.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.