| 单词 | grease spot | 
| 释义 | grease spotnoun  : a disease of turf grasses caused by a fungus (Pythium aphanidermatum) and characterized by spots usually under two inches in diameter but often coalesced into patches or streaks having a distinctive greasy border of blackened leaves and intermingled cottony mycelium  called also spot blight compare dollar spot | 
	
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