isidium

According to OED, from a genus name Isidium (Acharius 1798), itself from the goddess Isis.

isidium (plural isidia)

1. (lichenology) A vegetative reproductive structure present in some lichens; an outgrowth of the thallus surface, usually with a columnar structure, and consisting of both fungal hyphae and algal cells.

• propagule

• soredium

“isidium, n.”, in OED Online ⁠, Oxford, Oxfordshire: Oxford University Press, launched 2000.

• isidium on Wikipedia.Wikipedia

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isidium n (plural isidiën)

1. isidium

• isidium on the Dutch Wikipedia.Wikipedia ^nl