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lichen

noun · verb

Simple meaning

Any of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls.

Pronunciation

Say it like this:

lykuhn

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IPA pronunciation (US)

ˈlaɪkən

This word is pronounced essentially the same in American and British English, so one transcription covers both.

IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.

Word Review

Definition

Everyday modern meanings first, grouped by part of speech.

noun

  1. Any of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls, etc.

  2. figurative

    Something which gradually spreads across something else, causing damage.

verb

  1. transitive

    To cover with lichen.

Word at a Glance

Frequency
Uncommon
Formality
Technical

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Common Patterns and Combinations

How this word naturally appears with others.

Symbiotic / thallophytic

green lichenlichen growthlichen floragrey lichenyellow lichen

Several

lichen species

Cover

lichen cover

Other combinations

oral lichen

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Word Family

Related forms, grouped by how they connect.

Compound terms

Established multiword terms.

  • lichen planusnounCompound term

    An eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs.

  • lichen ruber planusnounCompound term

    An eruption of shiny flat-topped purplish (usually itchy) papules on the wrist and forearms and thighs.

  • beard lichennounCompound term

    Greenish grey pendulous lichen growing on trees.

  • horsehair lichennounCompound term

    Any of several lichens of the genus Alectoria having a thallus consisting of filaments resembling hair.

  • horsetail lichennounCompound term

    Any of several lichens of the genus Alectoria having a thallus consisting of filaments resembling hair.

  • iceland lichennounCompound term

    Lichen with branched flattened partly erect thallus that grows in mountainous and Arctic regions.

Related words

Connected by subject or meaning, not by word formation.

  • division lichenesnounRelated term

    Comprising the lichens which grow symbiotically with algae.

  • order lichenalesnounRelated term

    Category used especially in former classifications for organisms now constituting the division Lichenes.

Related Words

Connected to the same idea, not synonyms.

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Dictionary data from Wiktionary via the Free Dictionary API. Simple meanings, combinations and word intelligence are built from verified reference data, no AI is used to load this page.