noun
smut fungus causing blackish blisters on scales and leaves of onions; especially destructive to seedlings
• Syn: ↑Urocystis cepulae
• Hypernyms: ↑smut, ↑smut fungus
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noun1. : a fungus disease of the onion that is especially destructive to seedlings and is characterized by elongate blackish blisters on the scales and leaves
2. : the fungus (Urocystis cepulae) that causes onion smut
Useful english dictionary. 2012.