noun. any of the threadlike filaments forming the mycelium of a fungus.
1. Noun, singular or mass While they do not form septa between nuclei, they do form a septum at branch points that connect one filament to another, preventing the entire network from being compromised if one hypha is injured. 2. Verb, past participle Depending on the organism, at the very least hyphae (the singular is hypha) mold threads should be obvious.