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isidium

[ ahy-sid-ee-uhm ]

noun

, Botany.
, plural i·sid·i·a [ahy-, sid, -ee-, uh].
  1. a coralloid outgrowth from the thallus in certain lichens.


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Word History and Origins

Origin of isidium1

1865–70; < New Latin, derivative of Isid- (stem of Isis ) Isis (from the hornlike appearance of the growth); -ium

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isidioidIsidor