earthstar

[urth-stahr]
noun
1.
a fungus of the genus Geaster, having an outer covering that splits into the form of a star.
2.
any of various bromeliads of the genus Cryptanthus, native to Brazil, having rosettes of stiff, prickly leaves.

Origin:
1810–20; earth + star

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Collins
World English Dictionary
earthstar (ˈɜːθˌstɑː)
 
n
any of various basidiomycetous saprotrophic woodland fungi of the genus Geastrum, whose brown onion-shaped reproductive body splits into a star shape to release the spores

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The outer layer of earthstars splits into rays that arch back and lift the earthstar up.
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