Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
the name for the spores of smut fungi (order Ustilaginales) and certain other fungi, formed from specialized or nonspecialized cells of the hyphae, which become enlarged and usually acquire a thickened, often pigmented membrane. Depending on their numbers, chlamydospores may be solitary or grow in chains. They contain considerable reserves of nutrients. A fungus in its resting state can survive unfavorable environmental conditions by forming chlamydospores.