DictionarylichenFungus partnered with algae or bacteria
noun

lichen

LYE-kuhn/ˈlaɪkən/

An organism formed by a fungus living together with algae or cyanobacteria.

Pale green lichen grows across the surface of the rock.

A close view of a gray rock bearing distinctive pale sage-green leafy lichen rosettes and a small ochre crustose patch, with bare stone visible between colonies.
Etymology

Greek leichen originally meant “what eats around itself,” probably connected with leichein, “to lick.” The name thus presents the organism through an image of eating around itself.

In context

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… those who can find lichen are better off reindeer have adapted and so are able to gather high energy food like this
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More examples

  • She photographs the orange lichen on an old fence post.
  • Many lichens grow slowly and survive long periods without rain.
  • This lichen contains a fungus living together with algae.

Forms

lichen · lichens