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