Pileus
Encyclopedia
Pileus may refer to:
  • Pileus (hat)
    Pileus (hat)
    The pileus — also pilleus or pilleum — was a cap worn by sailors in Ancient Greece and later copied by Ancient Rome. It was a brimless, felt cap, somewhat similar to a fez...

    , a brimless cap
  • Pileus (mycology)
    Pileus (mycology)
    The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp that supports a spore-bearing surface, the hymenium. The hymenium may consist of lamellae, tubes, or teeth, on the underside of the pileus...

    , the "cap" of a mushroom
  • Pileus (meteorology)
    Pileus (meteorology)
    A pileus , also called scarf cloud or cap cloud, is a small, horizontal cloud that can appear above a cumulus or cumulonimbus cloud, giving the parent cloud a characteristic "hoodlike" appearance. Pilei tend to change shape rapidly. They are formed by strong updrafts acting upon moist air at lower...

    , a cloud formation
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