English definition of Lichen

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Definition of lichen

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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

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Lichenic :: Lichenic (a.) Of, pertaining to, or obtained from, lichens..

Orsellic :: Orsellic (a.) Pertaining to, or designating, an acid found in certain lichens, and called also lecanoric acid..

Perithecium :: Perithecium (n.) An organ in certain fungi and lichens, surrounding and enveloping the masses of fructification..

Fibrillose :: Fibrillose (a.) Covered with hairlike appendages, as the under surface of some lichens; also, composed of little strings or fibers; as, fibrillose appendages..

Cup-moss :: Cup-moss (n.) A kind of lichen, of the genus Cladonia..

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..

Lichenous :: Lichenous (a.) Of, pertaining to, or resembling, lichens; abounding in lichens; covered with lichens..

Scutellum :: Scutellum (n.) A rounded apothecium having an elevated rim formed of the proper thallus, the fructification of certain lichens..

Ascus :: Ascus (n.) A small membranous bladder or tube in which are inclosed the seedlike reproductive particles or sporules of lichens and certain fungi.

Cetraric :: Cetraric (a.) Pertaining to, or derived from, the lichen, Iceland moss (Cetaria Islandica)..

Persis :: Persis (n.) A kind of coloring matter obtained from lichens.

Scyphus :: Scyphus (n.) A cup-shaped stem or podetium in lichens. Also called scypha. See Illust. of Cladonia pyxidata, under Lichen..

Archil :: Archil (n.) A violet dye obtained from several species of lichen (Roccella tinctoria, etc.), which grow on maritime rocks in the Canary and Cape Verd Islands, etc..

Lichenography :: Lichenography (n.) A description of lichens; the science which illustrates the natural history of lichens.

Lichenographic :: Lichenographic (a.) Alt. of Lichenographica.

Lirella :: Lirella (n.) A linear apothecium furrowed along the middle; the fruit of certain lichens.

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..

Vulpic :: Vulpic (a.) Pertaining to, derived from, or designating, an acid obtained from a lichen (Cetraria vulpina) as a yellow or red crystalline substance which on decomposition yields pulvinic acid..

Parietic :: Parietic (a.) Pertaining to, or designating, an acid found in the lichen Parmelia parietina, and called also chrysophanic acid..

Licheniform :: Licheniform (a.) Having the form of a lichen.