Definition of red rot
1 : a common sundew (Drosera rotundifolia)
2a : either of two diseases of sugarcane: (1) : a destructive disease caused by a fungus (Physalospora tucumanensis) characterized by red patches within the canes and found also on sorgo (2) : a rot of the leaf sheaths caused by a fungus (Sclerotium rolfsii) b : a wood decay of various conifers and deciduous trees caused by various pore fungi —called also red heart c : adustiosis
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