Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A plant body undifferentiated into stem, root, or leaf.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An undifferentiated plant body, such as in algae.
  • n. Any plant body lacking vascular tissue.

from the GNU version of the Collaborative International Dictionary of English

  • n. A solid mass of cellular tissue, consisting of one or more layers, usually in the form of a flat stratum or expansion, but sometimes erect or pendulous, and elongated and branching, and forming the substance of the thallogens.

from The Century Dictionary and Cyclopedia

  • n. In botany, a vegetative body or plant-body undifferentiated into root, stem, or leaves; the plant-body characteristic of the Thallophyta. Also thalamus. See cut under applanate.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes

Etymologies

Latin, green stalk, from Greek thallos, from thallein, to sprout.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek θαλλός (thallos, "young shoot, twig"). (Wiktionary)

Examples

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