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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 tenacity. They are often improperly called rock moss or tree moss.
- 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.
- Lichened - a. - Belonging to, or covered with, lichens.
- Lichenic - a. - Of, pertaining to, or obtained from, lichens.
- Licheniform - a. - Having the form of a lichen.
- Lichenin - n. - A substance isomeric with starch, extracted from several species of moss and lichen, esp. from Iceland moss.
- Lichenographic - a. - Alt. of Lichenographical
- Lichenographical - a. - Of or pertaining to lichenography.
- Lichenographist - n. - One who describes lichens; one versed in lichenography.
- Lichenography - n. - A description of lichens; the science which illustrates the natural history of lichens.
- Lichenologist - n. - One versed in lichenology.
- Lichenology - n. - The science which treats of lichens.
- Lichenous - a. - Of, pertaining to, or resembling, lichens; abounding in lichens; covered with lichens.
- Cudbear - n. - A lichen (Lecanora tartarea), from which the powder is obtained.
- 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.
- 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.
- Usnea - n. - A genus of lichens, most of the species of which have long, gray, pendulous, and finely branched fronds. Usnea barbata is the common bearded lichen which grows on branches of trees in northern forests.
- Frond - n. - The organ formed by the combination or union into one body of stem and leaf, and often bearing the fructification; as, the frond of a fern or of a lichen or seaweed; also, the peculiar leaf of a palm tree.
- 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.
- Parelle - n. - A kind of lichen (Lecanora parella) once used in dyeing and in the preparation of litmus.
- Treebeard - n. - A pendulous branching lichen (Usnea barbata); -- so called from its resemblance to hair.
- Parietic - a. - Pertaining to, or designating, an acid found in the lichen Parmelia parietina, and called also chrysophanic acid.
- Gonimous - a. - Pertaining to, or containing, gonidia or gonimia, as that part of a lichen which contains the green or chlorophyll-bearing cells.
- Orchilla weed - - The lichen from which archil is obtained. See Archil.