| 单词 | lichen |
| 释义 | lichen (once / 3263 pages) 1n 2n Have you ever walked through the woods and seen a crusty-looking shelf growing out of a tree? That is actually a lichen, a complex organism comprised of a fungus and its partner algae, the two parts interweaving to form one. The word lichen appeared around 1600, and was drawn from the Greek leikhēn, meaning "what eats around itself." This is a good meaning for what the word represents, as lichen is comprised of fungus cells that literally surround the algae cells to form a mutualistic bond. Because of the crusty look of a lichen, the name has also been given to a number of skin diseases that present the same patchy look as the fungus-algae. WORD FAMILYlichen: lichens USAGE EXAMPLESOne species of orange-red lichen grows only on Santa Rosa Island off the coast of California: firedot lichen. Science Magazine(Dec 29, 2016) SAT Walk to explore mosses and lichens of the park, deciduous and evergreen trees, wildlife preparations for winter, 10 a.m. Seattle Times(Dec 08, 2016) Reindeer lichen, another ingredient that didn’t entirely win me over last time around, is back. New York Times(Dec 06, 2016) 1 n any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc. 2Hypo|Hyper ascolichen a lichen in which the fungus component is an ascomycete basidiolichena lichen in which the fungus component is a basidiomycete lecanoraany lichen of the genus Lecanora; some used in dyeing; some used for food Roccella tinctoria, roccellaa source of the dye archil and of litmus Usnea barbata, beard lichen, beard mossgreenish grey pendulous lichen growing on trees horsehair lichen, horsetail lichenany of several lichens of the genus Alectoria having a thallus consisting of filaments resembling hair Cladonia rangiferina, arctic moss, reindeer lichen, reindeer mossan erect greyish branching lichen of Arctic and even some north temperate regions constituting the chief food for reindeer and caribou and sometimes being eaten by humans crotal, crottal, crottleany of several lichens of the genus Parmelia from which reddish brown or purple dyes are made Cetraria islandica, Iceland lichen, Iceland mosslichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions; used as a medicine or food for humans and livestock; a source of glycerol manna lichenany of several Old World partially crustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals archil, orchilany of various lecanoras that yield the dye archil fungus an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia n any of several eruptive skin diseases characterized by hard thick lesions grouped together and resembling lichens growing on rocks Hypo|Hyper lichen planus, lichen ruber planus an eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs disease of the skin, skin disease, skin disorder a disease affecting the skin |
| 随便看 |
|
英语词典包含147318条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。