Chaetomium
noun
Chae·to·mi·um
| \ kēˈtōmēəm\
Definition of Chaetomium
: a genus (the type of the family Chaetomiaceae) of ascomycetous fungi that are characterized by long straight, curled, or branched hairs on the usually dull-colored perithecia especially on their upper surfaces and that include several fungi destructive to paper and other materials and to some plastics
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