Pileus
WordNet

noun


(1)   A fruiting structure resembling an umbrella that forms the top of a stalked fleshy fungus such as a mushroom
WiktionaryText

Noun



  1. the cap of a mushroom.
  2. the bell of a jellyfish
  3. a small thin cloud attached to a cumulus cloud.
  4. a conical felt hat worn in ancient Rome and Greece
 
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