单词 | pileus |
释义 | pileus [`pil·ē·ǝs] BIOLOGY The umbrella-shaped upper cap of mushrooms and other basidiomycetous fungi. METEOROLOGY An accessory cloud of small horizontal extent, often cirriform, in the form of a cap, hood, or scarf, which occurs above or attached to the top of a cumuliform cloud that often pierces it; several pileus clouds fairly often are observed above each other. Also known as scarf cloud. |
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