Definition of lichen

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Lichen (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..

Lern More About Lichen

Manna :: Manna (n.) A name given to lichens of the genus Lecanora, sometimes blown into heaps in the deserts of Arabia and Africa, and gathered and used as food..
Persis :: Persis (n.) A kind of coloring matter obtained from lichens.
Maplike :: Maplike (a.) Having or consisting of lines resembling a map; as, the maplike figures in which certain lichens grow..
Agar-agar :: Agar-agar (n.) A fucus or seaweed much used in the East for soups and jellies; Ceylon moss (Gracilaria lichenoides).
Orcin :: Orcin (n.) A colorless crystalline substance, C6H3.CH3.(OH)2, which is obtained from certain lichens (Roccella, Lecanora, etc.), also from extract of aloes, and artificially from certain derivatives of toluene. It changes readily into orcein..
Lichenographist :: Lichenographist (n.) One who describes lichens; one versed in lichenography.
Lichenous :: Lichenous (a.) Of, pertaining to, or resembling, lichens; abounding in lichens; covered with lichens..
Cudbear :: Cudbear (n.) A lichen (Lecanora tartarea), from which the powder is obtained..
Mycose :: Mycose (n.) A variety of sugar, isomeric with sucrose and obtained from certain lichens and fungi. Called also trehalose..
Evernic :: Evernic (a.) Pertaining to Evernia, a genus of lichens; as, evernic acid..
Patella :: Patella (n.) A kind of apothecium in lichens, which is orbicular, flat, and sessile, and has a special rim not a part of the thallus..
Ascospore :: Ascospore (n.) One of the spores contained in the asci of lichens and fungi. [See Illust. of Ascus..
Iceland Moss :: Iceland moss () A kind of lichen (Cetraria Icelandica) found from the Arctic regions to the North Temperate zone. It furnishes a nutritious jelly and other forms of food, and is used in pulmonary complaints as a demulcent..
Lichenographic :: Lichenographic (a.) Alt. of Lichenographica.
Lecanoric :: Lecanoric (a.) Pertaining to, or designating, an organic acid which is obtained from several varieties of lichen (Lecanora, Roccella, etc.), as a white, crystalline substance, and is called also orsellic, / diorsellinic acid, lecanorin, etc..
Lichenology :: Lichenology (n.) The science which treats of lichens.
Trica :: Trica (n.) An apothecium in certain lichens, having a spherical surface marked with spiral or concentric ridges and furrows..
Athalamous :: Athalamous (a.) Not furnished with shields or beds for the spores, as the thallus of certain lichens..
Cudbear :: Cudbear (n.) A powder of a violet red color, difficult to moisten with water, used for making violet or purple dye. It is prepared from certain species of lichen, especially Lecanora tartarea..
Lichenography :: Lichenography (n.) A description of lichens; the science which illustrates the natural history of lichens.
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