ozonium

from The Century Dictionary.

• noun A name applied to certain forms of sterile fungous mycelia whose connection with fruiting forms is either doubtful or unknown. The root-rot of cotton and various other cultivated and wild plants in the southwestern United States has been attributed to O. auricomum. See root-rot.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun form genus of imperfect fungi