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


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)



Log in or sign up to get involved in the conversation. It's quick and easy.