thallus
English
Etymology
From Ancient Greek θαλλός (thallós, “young shoot, twig”), from Proto-Indo-European *dʰal (“to bloom”).
Noun
thallus (plural thalluses or thalli)
- (botany) An undifferentiated plant body, such as in algae.
- 1854 August 9, Henry D[avid] Thoreau, “Spring”, in Walden; or, Life in the Woods, Boston, Mass.: Ticknor and Fields, →OCLC:
- As it flows it takes the forms of sappy leaves or vines, making heaps of pulpy sprays a foot or more in depth, and resembling, as you look down on them, the laciniated, lobed, and imbricated thalluses of some lichens; […]
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- (botany) Any plant body lacking vascular tissue.
Related terms
- thalliform
- thalline
- thallodal
- thalloid
- Thallobionta
- Thallophyta
- thallophyte
- thallose
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