thallus [ thal- uh s ] SHOW IPA / ˈθæl əs / PHONETIC RESPELLING EXAMPLES | WORD ORIGIN 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
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for thalli British Dictionary definitions for thalli noun plural thalli ( ˈθælaɪ) or thalluses the undifferentiated vegetative body of algae, fungi, and lichens Derived Forms thalloid, adjective 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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Word Origin and History for thalli n.
Latin, from Greek
thallos "green shoot, twig," related to thalia "abundance," thalos "scion, child," ultimately from PIE root *dhal- "to bloom" (cf. Old Irish duilesc, a type of algae).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for thalli 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.
Science definitions for thalli 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
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