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isidium
noun
isid·i·um
\īˈsidēəm\
Definition of isidium
isidia
\-ēə\: an outgrowth from the surface of the thallus in certain lichens that resembles a soredium
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Origin and Etymology of 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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