单词 | tar spot |
释义 | tar spotnoun1 a : a leaf-blotch disease of maple, willow, or oak caused by fungi of the genus Rhytisma that produces raised black stromatic cushions on the foliage b : one of the spots produced 2 : a disease of many grasses caused by a fungus (Phyllacora graminis) and resembling the tar spot of trees |
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