thallus Meaning, Definition & Usage

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

WordNet

Thal"lus noun
Etymology
NL., fr. Gr. young shoot or branch, frond.
Wordforms
plural Thalli
Definitions
  1. (Bot.) 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.

Webster 1913