Definition of Lichen. Meaning of Lichen. Synonyms of Lichen

Here you will find one or more explanations in English for the word Lichen. Also in the bottom left of the page several parts of wikipedia pages related to the word Lichen and, of course, Lichen synonyms and on the right images related to the word Lichen.

Definition of Lichen

Lichen
Lichen Li"chen (l[imac]"k[e^]n; 277), n. [L., fr. Gr. leichh`n.] 1. (Bot.) One of a class of cellular, flowerless plants, (technically called Lichenes), having no distinction of leaf and stem, usually of scaly, expanded, frond-like forms, but sometimes erect or pendulous and variously branched. They derive their nourishment from the air, and generate by means of spores. The species are very widely distributed, and form irregular spots or patches, usually of a greenish or yellowish color, upon rocks, trees, and various bodies, to which they adhere with great tenacity. They are often improperly called rock moss or tree moss. Note: A favorite modern theory of lichens (called after its inventor the Schwendener hypothesis), is that they are not autonomous plants, but that they consist of ascigerous fungi, parasitic on alg[ae]. Each lichen is composed of white filaments and green, or greenish, rounded cells, and it is argued that the two are of different nature, the one living at the expense of the other. See Hyph[ae], and Gonidia. 2. (Med.) A name given to several varieties of skin disease, esp. to one characterized by the eruption of small, conical or flat, reddish pimples, which, if unchecked, tend to spread and produce great and even fatal exhaustion.

Meaning of Lichen from wikipedia

- Common lichen growth forms A lichen (/ˈlaɪkən/, LEYE-ken or (especially in the UK) /ˈlɪtʃən/, LICH-en) is a composite organism that arises from algae or...
- Lichen pl**** is a chronic inflammatory and immune mediated disease that affects the skin, nails, hair, and mucous membranes. It is characterized by polygonal...
- Lichen sclerosus (LS) is a chronic, inflammatory skin disease of unknown cause, commonly appearing as whitish patches on the genitals, which can affect...
- A fruticose lichen is a form of lichen fungi that is characterized by a coral-like shrubby or bushy growth structure. It is composed of a thallus and a...
- Foliose lichen is one of a variety of lichens, which are complex organisms that arise from the symbiotic relationship between fungi and a photosynthetic...
- Lichen is a type of symbiotic organism. Lichen may also refer to: Lichens (musician), Robert Lowe's solo musical project "Lichen", the nickname for an...
- Crustose lichens form a crust that strongly adheres to the substrate (soil, rock, tree bark, etc.), making separation from the substrate impossible without...
- of lichen are able to fix nitrogen from the atmosphere. This process relies on the presence of cyanobacteria as a partner species within the lichen. The...
- A leprose lichen is a lichen with a powdery or granular surface. Leprose lichens lack an outer "skin," or cortex. If a crustose lichen starts to disintegrate...
- Symbiosis in lichens is the mutually helpful symbiotic relationship of green algae and/or blue-green algae (cyanobacteria) living among filaments of a...
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