geastern.
/dʒiːˈastə/ An earth-star (see earth n.1 Compounds 8b).
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geaster1887
1887 W. Phillips Man. Brit. Discomycetes 213 Splitting into several lobes, like a Geaster.
This entry has not yet been fully updated (first published 1933; most recently modified version published online March 2018).
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n.1887