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thallus |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Thallus \Thal"lus\, n.; pl {Thalli}. [NL., fr Gr ? young shoot or branch, frond.] (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. From WordNet r 1.6 [wn]: thallus n : a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes
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