hypha

Etymology

From New Latin hypha, from Ancient Greek ὑφή (huphḗ, “web”).

noun

1. (mycology) Any of the long, threadlike filaments that form the mycelium of a fungus.
   She lays out how fungal hyphae—countless miles of filaments folded up in every spoon of soil—coax open tree roots and tap into them. 2018, Richard Powers, The Overstory, Vintage (2019), page 272