pycnium
noun
pyc·ni·um
| \ ˈpiknēəm\
plural pycnia\ -ēə \
Definition of pycnium
: one of the small flask-shaped fruit bodies of a rust fungus formed in clusters just beneath the surface of the host tissue, produced as a result of infection by a single basidiospore, and producing haploid flexuous hyphae and pycniospores
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