mycelium my·ce·li·um (mī-sē'lē-əm)
n. pl. my·ce·li·a (-lē-ə)
The vegetative part of a fungus, which consists of a mass of branching, threadlike hyphae.
|mycelium (mī-sē'lē-əm) Pronunciation Key
The mass of fine branching tubes (known as hyphae) that forms the main growing structure of a fungus. Visible structures like mushrooms are reproductive structures produced by the mycelium.