adiaspore

A fungus spore which, when growing in the lungs of an animal or incubated in vitro at elevated temperatures, increases greatly in size without eventual reproduction or replication. [G. a- priv. + dia, through, + sporos, seed]

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adi·a·spore (adґe-ə-spor″) a spore produced by the soil fungi Emmonsia parva and E. crescens, which, after inhalation into the lungs, enlarges to form a huge spherule without endospores.