thallus
[ thal-uhs ]
/ ˈθæl əs /
noun, plural thal·li [thal-ahy], /ˈθæl aɪ/, thal·lus·es.Botany, Mycology.
a simple vegetative body undifferentiated into true leaves, stem, and root, ranging from an aggregation of filaments to a complex plantlike form.
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Origin of thallus
1820–30; <New Latin <Greek thallós young shoot, twig
Words nearby thallus
thallium sulfate, thallo-, thalloid, thallophyte, thallous, thallus, thalweg, Thamar, Thames, Thames River, thamin
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for thallus
British Dictionary definitions for thallus
thallus
/ (ˈθæləs) /
noun plural thalli (ˈθælaɪ) or thalluses
the undifferentiated vegetative body of algae, fungi, and lichens
Derived forms of thallus
thalloid, adjectiveWord Origin for thallus
C19: from Latin, from Greek thallos green shoot, from thallein to bloom
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Medical definitions for thallus
thallus
[ thăl′əs ]
n. pl. thal•lus•es
A plant body or fungus undifferentiated into stem, root, or leaf.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for thallus
thallus
[ thăl′əs ]
Plural thalli (thăl′ī)
A type of body found among plants and fungi that is not differentiated into roots, stems, or leaves. Thalli are found among lichens, mosses, liverworts, and many algae, as well as the gametophyte generations of horsetails and ferns, which have rhizoids but not true roots.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.