a fungus of the genus Geaster, having an outer covering that splits into the form of a star.
any of various bromeliads of the genus Cryptanthus, native to Brazil, having rosettes of stiff, prickly leaves.

1810–20; earth + star Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
earthstar (ˈɜːθˌstɑː)
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
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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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