aethalium

[ ee-they-lee-uh m ]
/ iˈθeɪ li əm /
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noun, plural ae·tha·li·a [ee-they-lee-uh] /iˈθeɪ li ə/. Mycology.

a large, plump, pillow-shaped fruiting body of certain myxomycetes, formed by the aggregation of plasmodia into a single functional mass.

Origin of aethalium

< New Latin, originally a genus of Myxomycetes containing such a body < Greek aíthal(os) or aithál(ē) thick smoke, soot (akin to aíthein to kindle, burn) + New Latin -ium -ium; so named from the smokelike spores
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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