noun, Plant Pathology.
a symptom or phase of many diseases of plants, characterized by necrotic spots or streaks on the leaves, accompanied by seed rot and seedling blight.
any disease so characterized.
noun, Plant Pathology. 1. a symptom or phase of certain especially fungal diseases of plants, characterized by necrotic discoloration of the leaves. 2. any disease so characterized.
- Leaf blower
noun an engine-driven device used to propel fallen leaves and other debris for removal Examples Does any lawn-care implement inspire more controversy and vitriol than the leaf blower? Word Origin late 1950s
noun 1. See under 1 (def 1a). [buhd] /bʌd/ noun 1. Botany. 2. Zoology. (in certain animals of low organization) a prominence that develops into a new individual, sometimes permanently attached to the parent and sometimes becoming detached; gemma. 3. Mycology. a small, rounded outgrowth produced from a fungus spore or cell by a process […]
noun 1. any of various butterflies of the genus Kallima, of southern Asia, the East Indies, and Australia, having wings that resemble dead leaves.