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Dictionary Language resources

thallus

Syllabification: (thal·lus)

Pronunciation: /ˈTHaləs/

Definition of thallus

noun (plural thalli /ˈTHalī/)

Botany

a plant body that is not differentiated into stem and leaves and lacks true roots and a vascular system. Thalli are typical of algae, fungi, lichens, and some liverworts.