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Word of the Day Tuesday, June 9, 2026

thallus

/θæləs/ noun · British & US
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What does thallus mean?

noun

A thallus is the vegetative part of a plant, such as a fern or a liverwort, that grows from a single point and is not differentiated into roots, stem, and leaves. It is a flat or branching structure that produces new plants.

Example

"The thallus of the liverwort was a flat, green sheet that covered the rock."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for thallus

Antonyms of thallus

Rhymes with thallus

Etymologically related