thallus
[thal-uh s]
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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.
Origin of thallus
1820–30; < New Latin < Greek thallós young shoot, twig
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for thallus
Historical Examples of thallus
The colors of the Thallus and apothecia of Lichens—their causes, and the circumstances which modify and alter them.
The Commercial Products of the Vegetable KingdomP. L. Simmonds
Another method is by the agency of little spores (zoospores) that are produced at the edges or extremities of the thallus.
The Sea ShoreWilliam S. Furneaux
Flowering plants cannot have directly arisen out of thallus plants, nor out of mosses; but only out of ferns, or Filicines.
The History of Creation, Vol. II (of 2)Ernst Haeckel
They are distinguished by possessing as gonidia algae foreign to the ordinary part of the thallus.
The thallus or body of the lichen is of very different form in different genera.
thallus
noun plural thalli (ˈθælaɪ) or thalluses
Word 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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Online Etymology Dictionary, © 2010 Douglas Harper
thallus
[thăl′əs]
n. pl. thal•lus•es
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
thallus
[thăl′əs]
Plural thalli (thăl′ī)
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.