lichen
n. any of a number of skin diseases (Pathology) n. plant organism made up of a fungus and an alga which grow together on rocks (tree trunks, walls etc.) | ||||
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Lichen definition was found in categories: Language, Idioms & Slang(3) Arts & Humanities(1) Medicine(1) Science & Technology(1) Encyclopedia(1)
Lichen Definition from Language, Idioms & Slang Dictionaries & Glossaries
| Webster's Revised Unabridged Dictionary (1913) |
Lichen
(n.)
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.
(n.)
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.
(n.)
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.
(n.)
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.
| WordNet 2.0 |
lichen
Noun
1. any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
(hypernym) skin disease, disease of the skin, skin disorder, skin problem, skin condition
(hyponym) lichen planus, lichen ruber planus
2. any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
(hypernym) fungus
(hyponym) ascolichen
(member-holonym) Lichenes, division Lichenes
Noun
1. any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
(hypernym) skin disease, disease of the skin, skin disorder, skin problem, skin condition
(hyponym) lichen planus, lichen ruber planus
2. any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
(hypernym) fungus
(hyponym) ascolichen
(member-holonym) Lichenes, division Lichenes
| hEnglish - advanced version |
lichen
lichen
\li"chen\ (lī"k&ebreve;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?. 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?, 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.
lichen
n
1. any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
2. any thallophytic plant of the division lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
similar words(7)
lichen ruber planus
map lichen
lichen planus
reindeer lichen
dog lichen
iceland lichen
lung lichen
lichen
\li"chen\ (lī"k&ebreve;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?. 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?, 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.
lichen
n
1. any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks
2. any thallophytic plant of the division lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.
similar words(7)
lichen ruber planus
map lichen
lichen planus
reindeer lichen
dog lichen
iceland lichen
lung lichen
Lichen Definition from Arts & Humanities Dictionaries & Glossaries
| JM Latin-English Dictionary |
lichen
N M
lichen (vegetation growing on trees); skin eruption
N M
lichen (vegetation growing on trees); skin eruption
Lichen Definition from Medicine Dictionaries & Glossaries
| Hepatitis Central (TM) Liver Disease Medical Glossary |
Lichen
Name applied to many different kinds of papular skin diseases
Name applied to many different kinds of papular skin diseases
Lichen Definition from Science & Technology Dictionaries & Glossaries
| Physical Geography Terms and Meanings |
Lichen
Organism that consists of a symbiotic joining of a species of fungi and a species of algae.
Organism that consists of a symbiotic joining of a species of fungi and a species of algae.
Lichen Definition from Encyclopedia Dictionaries & Glossaries
| Wikipedia English - The Free Encyclopedia |
Lichen
Lichens are symbiotic associations of a fungus (the mycobiont) with a photosynthetic partner (the photobiont also known as the phycobiont) that can produce food for the lichen from sunlight. The photobiont is usually either green algae or cyanobacteria. A few lichens are known to contain yellow-green algae or, in one case, a brown alga. Some lichens contain both green algae and cyanobacteria as photobionts; in these cases, the cyanobacteria symbiont component may specialize in fixing atmospheric nitrogen for metabolic use.
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