flabelliform

/fləˈbɛl.ɪ.fɔːrm/
adjective
  1. Having the shape of a fan; fan-shaped.
    • The flabelliform petals of the cactus opened in the morning sun.
    • Geologists found flabelliform fossils in the ancient rock layers.
    • The flabelliform design of the building's roof helped with ventilation.
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