I. -lēəm, lyəm noun
( plural ae·tha·lia -ēə, -yə)
Etymology: New Latin, from Greek aithalos thick smoke, soot (from aithein to burn) + New Latin -ium — more at edify
: a sessile flat encrusted fruiting body in several genera of the slime molds (class Myxomycetes) formed by the fusion of many plasmodia
II.
Etymology: New Latin
synonym of fuligo