lichen

play
noun li·chen \ˈlī-kən, British also ˈli-chən\

Definition of lichen

  1. 1 :  any of several skin diseases characterized by a papular eruption

  2. 2 :  any of numerous complex plantlike organisms made up of an alga and a fungus growing in symbiotic association on a solid surface (as a rock)

lichened

play \-kənd\ adjective

lichenous

play \-kə-nəs\ adjective

Illustration of lichen

Origin and Etymology of lichen

Latin, from Greek leichēn, lichēn, from leichein to lick


First Known Use: circa 1657


LICHEN Defined for English Language Learners

lichen

play
noun li·chen \ˈlī-kən, British also ˈli-chən\

Definition of lichen for English Language Learners

  • : a type of small plant that grows on rocks and walls


LICHEN Defined for Kids

lichen

play
noun li·chen \ˈlī-kən\

Definition of lichen for Students

  1. :  a plantlike organism made up of an alga and a fungus growing together


Medical Dictionary

lichen

play
noun li·chen \ˈlī-kən\

Medical Definition of lichen

  1. 1:  any of several skin diseases characterized by the eruption of flat papules; especially :  lichen planus

  2. 2:  any of numerous complex plantlike organisms made up of an alga and a fungus growing in symbiotic association on a solid surface (as a rock)


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