pulvinate

/ˈpʌlvɪneɪt/
adjective
  1. Having a cushion-like or swollen shape, often used to describe plant parts or geological formations.
    • The pulvinate leaves of the succulent store water in their thick pads.
    • The cactus has pulvinate stems that help it survive in dry conditions.
    • Geologists described the rock formation as pulvinate because of its rounded, pillow-like appearance.
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