Definitions for lichen
ˈlaɪ kənlichen

Princeton's WordNetRate this definition:0.0 / 0 votes

1. lichennoun

   any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks

2. lichennoun

   any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.

WiktionaryRate this definition:1.5 / 2 votes

1. lichennoun

   Any of many symbiotic organisms, being associations of fungi and algae; often found as white or yellow patches on old walls, etc.

ChatGPTRate this definition:0.0 / 0 votes

1. lichen

   Lichen is a composite organism that arises from a symbiotic relationship between a fungus and an alga or a cyanobacteria, or both. The fungal part of lichen provides the structure and the algal or cyanobacterial part provides the ability to photosynthesize and produce food. They are found in various environments, from deserts to the Arctic tundra, often on the surface of rocks, bark, leaves, or walls, known for their ability to withstand harsh conditions and for their slow growth.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Lichennoun

   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

2. Lichennoun

   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

3. Etymology: [L., fr. Gr. leichh`n.]

WikidataRate this definition:3.0 / 1 vote

1. Lichen

   Lichens are composite organisms consisting of a fungus and a photosynthetic partner growing together in a symbiotic relationship. The photobiont is usually either a green alga or cyanobacterium. The morphology, physiology and biochemistry of lichens are very different from those of the isolated fungus and alga in culture. Lichens occur in some of the most extreme environments on Earth—arctic tundra, hot deserts, rocky coasts, and toxic slag heaps. However, they are also abundant as epiphytes on leaves and branches in rain forests and temperate woodland, on bare rock, including walls and gravestones, and on exposed soil surfaces in otherwise mesic habitats. The roofs of many buildings have lichens growing on them. Lichens are widespread and may be long-lived; however, many are also vulnerable to environmental disturbance, and may be useful to scientists in assessing the effects of air pollution, ozone depletion, and metal contamination. Lichens have also been used in making dyes and perfumes, as well as in traditional medicines.

Chambers 20th Century DictionaryRate this definition:0.0 / 0 votes

1. Lichen

   lī′ken, lich′en, n. one of an order of cellular flowerless plants: an eruption on the skin.—adjs. Lī′chened, covered with lichens; Lichen′ic, pertaining to lichens; Lī′cheniform.—ns. Lī′chenine, a starch-like substance, found in Iceland moss and other lichens; Lī′chenist, Lichenog′rapher, one versed in Lichenog′raphy, the description of lichens.—adjs. Lichenograph′ic, -al.—n. Lichenol′ogy, the department of botany relating to lichens.—adj. Lī′chenous, abounding in, or pertaining to, lichens. [L.,—Gr. leichēn—leichein, to lick.]

Matched Categories

1. • Fungus
   • Skin Disease

How to pronounce lichen?

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How to say lichen in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of lichen in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of lichen in Pythagorean Numerology is: 6

Examples of lichen in a Sentence

1. Matthew Nelsen:

   When you see a lichen, you're basically looking at all fungal tissue, with some algal cells hidden away and protected inside, loosely speaking, it's like a greenhouse -- the fungus creates a more hospitable environment for the algae.

2. Jochen Brocks:

   Scientists have been fighting for more than 75 years over what Dickinsonia and other bizarre fossils of the Ediacaran Biota were : giant single-celled amoeba, lichen, failed experiments of evolution or the earliest animals on Earth, the fossil fat now confirms Dickinsonia as the oldest known animal fossil.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=lichen
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Lichen
3. ^ ChatGPT
   https://chat.openai.com
4. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/lichen
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=lichen
6. ^ Chambers 20th Century Dictionary
   https://www.gutenberg.org/files/37683/37683-h/37683-h.htm#:~:text=lichen