mycelium

noun

my·​ce·​li·​um mī-ˈsē-lē-əm 

plural mycelia mī-ˈsē-lē-ə 

: the mass of interwoven filamentous hyphae that forms especially the vegetative portion of the thallus of a fungus and is often submerged in another body (as of soil or organic matter or the tissues of a host)

also : a similar mass of filaments formed by some bacteria (such as streptomyces)

mycelial

mī-ˈsē-lē-əl 

adjective

Examples of mycelium in a Sentence

Recent Examples on the Web

The smallest details deserved second glances, including door cards finished in open-pore wood grain, luxury materials grown using mycelium (the root structure of mushrooms), and color-shifting metal tints inspired by the aurora borealis. —Michael Teo Van Runkle, Forbes, 20 Sep. 2024

By growing the mushroom’s mycelium, or rootlike threads, into the robot’s hardware, a team led by Cornell University researchers has engineered two types of robots that sense and respond to the environment by harnessing electrical signals made by the fungus and its sensitivity to light. —Katie Hunt, CNN, 4 Sep. 2024

The mycelium is a large network of branching filamentous structures called hyphae, which are often located underground. —Jacek Krywko, Ars Technica, 19 Sep. 2024

The approach has gotten some validation, with Beyond Meat planning to offer a steak alternative made from mycelium as part of its turnaround effort. —Richard Collings, Axios, 13 Sep. 2024

Word History

Etymology

borrowed from New Latin, from myc- (from base of Greek mykēt-, mýkēs "mushroom, fungus") + -el- (of unknown origin) + -ium -ium — more at myco-

Note: Term introduced by the Austrian botanist and mycologist Leopold Trattinnick (1764-1849) in Fungi Austriaci, ad specimina viva cera expressi descriptiones ac historiam naturalem completam addidit Leopoldus Trattinnick/Oesterreichs Schwämme, nach lebendigen Originalen in Wachs gearbeitet mit Beschreibungen und einer ausführlichen Naturgeschichte, 1. Lieferung (Vienna, 1804). Trattinnick, who uses the word throughout the work, gives no indication of its derivation. His translation in the parallel vernacular columns is Schwammgewächs, literally, "mushroom growth." The reading of -el- as Greek hêlos "nail head, wart, callus," apparently first proposed in the Century Dictionary and copied by many dictionaries since, is improbable and in any case purely speculative. Somewhat more probable is the suggestion in the Oxford English Dictionary that the interposed -l- is after epithelium.

First Known Use

1836, in the meaning defined above

Kids Definition

mycelium

noun

my·​ce·​li·​um mī-ˈsē-lē-əm 

plural mycelia

-lē-ə

: the part of the body of a fungus that does not reproduce and usually consists of a mass of hyphae that are often growing in something else (as soil, organic matter, or the tissues of a plant or animal host)

mycelial

-lē-əl 

adjective

Medical Definition

mycelium

noun

my·​ce·​li·​um mī-ˈsē-lē-əm 

plural mycelia -lē-ə 

: the mass of interwoven filamentous hyphae that forms especially the vegetative body of a fungus and is often submerged in another body (as of soil or organic matter or the tissues of a host)

also : a similar mass of filaments formed by some bacteria (as of the genus Streptomyces)