1 isidia | Definition of isidia
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isidium

noun
isid·​i·​um | \ īˈsidÄ“É™m\
plural isidia\ -​Ä“É™ \

Definition of isidium

: an outgrowth from the surface of the thallus in certain lichens that resembles a soredium

History and Etymology for isidium

New Latin, from Isidium, supposed genus of lichens, irregular from Isis genus of gorgonians + Greek eidos form; from the resemblance of lichens that have isidia to gorgonians

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