• (n. pl.) The long, branching filaments of which the mycelium (and the greater part of the plant) of a fungus is formed. They are also found enveloping the gonidia of lichens, making up a large part of their structure.
A fine threadlike structure of cell formed by fungi affecting a plant.
pl. of hypha; the threads making up the mycelium of a fungus.
thin tubes or threads, which spread out from the seeds, across the surface of timber, feeding on the starch, sugar and moisture it contains. See Dry Rot/Wet Rot. 
<microbiology> The fine, branching tubes which make up the body (or mycelium) of a multicellular fungus. ... (11 Jan 1998) ... 
Thread like structures found on a fungus.
tubular, filamentous structures that makes up most fungi
The threadlike filaments that form the vegetative part of a fungus.