thallus

noun — 2 senses

thallus

noun

UK, US /ˈθæl.əs/

Etymology From Ancient Greek θαλλός (thallós, “young shoot, twig”), from Proto-Indo-European *dʰelh₁- (“to bloom”).

1

Biology, Botany, Natural sciences An undifferentiated plant body, such as in algae.

  • 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; […]1854 August 9, Henry D[avid] Thoreau, “Spring”, in Walden; or, Life in the Woods, Boston, Mass.: Ticknor and Fields, →OCLC:
2

Biology, Botany, Natural sciences Any plant body lacking vascular tissue.

Derived terms
Abrothallus, Chrysothallus, Cryptothallus, Didymothallus, Geothallus, Greeneothallus, Himantothallus, hypothallus, Makednothallus, perithallus, Phaeothallus, pseudothallus, Rhizothallus, Sandeothallus, thallodic, Xenothallus
Related terms
Phyllothallia, thalliform, thalline, thallium, Thallobionta, thallodal, thalloid, Thallophyta, thallophyte, thallose

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.