thallus
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
1Words Nearby thallus
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use thallus in a sentence
In these there is a thallus which starts from a central point and continually divides in a forked or dichotomous manner.
The plant-body of a sea weed is called a thallus, and differs considerably in the various species.
The Sea Shore | William S. FurneauxAnother method is by the agency of little spores (zoospores) that are produced at the edges or extremities of the thallus.
The Sea Shore | William S. FurneauxThey are many times forked in the same plane, which produces a flat thallus.
The Sea-beach at Ebb-tide | Augusta Foote ArnoldThe structure of the thallus may serve to represent that of most of the Lichens.
An Elementary Text-book of the Microscope | John William Griffith
British Dictionary definitions for thallus
/ (ˈθæləs) /
the undifferentiated vegetative body of algae, fungi, and lichens
Origin of thallus
1Derived forms of thallus
- thalloid, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for thallus
[ thăl′əs ]
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.
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