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Definition of Thallus
1. Noun. A plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes.
Definition of Thallus
1. 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.
Definition of Thallus
1. Noun. (botany) An undifferentiated plant body, such as in algae. ¹
2. Noun. (botany) Any plant body lacking vascular tissue. ¹
¹ Source: wiktionary.com
Definition of Thallus
1. a plant body without true root, stem, or leaf [n -LI or -LUSES] : THALLOID [adj]
Medical Definition of Thallus
1. The vegetative body of a plant that is not differentiated into organs such as stems and leaves, for example algae, the gametophytes of many liverworts. (09 Oct 1997)
Lexicographical Neighbors of Thallus
Literary usage of Thallus
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General by Thomas Spencer Baynes (1888)
"thallus branched, rounded, or compressed, with woolly medulla. ... —thallus
crustaceous, rarely evanescent or obsolete; ..."
2. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"The vegetative body or thallus varies from a fraction of a millimeter to several
decimeters ... The shape of the thallus is typically orbicular or stellate; ..."
3. The Micrographic Dictionary: A Guide to the Examination and Investigation of by John William Griffith, Arthur Henfrey (1883)
"Apothecia beneath formed of the thallus, to which thev are appressed and fixed
... Apothecia circular, peltate, formed of the thallus, the disk coloured and ..."
4. The Micrographic Dictionary: A Guide to the Examination and Investigation of by John William Griffith, Arthur Henfrey (1883)
"A¡v>- thecia beneath formed of the thallus, to which they are appressed and ...
Apothecia circular, peltate, formed of the thallus, the disk coloured and ..."
5. Memoirs of the Torrey Botanical Club by Torrey Botanical Club (1899)
"Epidermal cells from near the thallus-apex, X. 12. Epidermis from an older part
of the thallus, showing remnants of the primitive ..."
6. The Americana: A Universal Reference Library, Comprising the Arts and ...by Frederick Converse Beach, George Edwin Rines by Frederick Converse Beach, George Edwin Rines (1912)
"The vegetative body or thallus varies from a fraction of a millimetre to several
decimetres ... The shape of the thallus is typically orbicular or stellate; ..."
7. Handbook of Practical Botany: For the Botanical Laboratory and Private Student by Eduard Strasburger (1887)
"Surface-sections taken from the ventral side of the thallus show no division into
areas. ... They serve, perhaps, the purpose of stiffening the thallus. ..."
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