Definition of thallus
thalliplay \ˈtha-ˌlī, -ˌlē\ or
: a plant body that lacks differentiation into distinct parts (as stem, leaves, and roots), does not grow from an apical point, and is characteristic of organisms formerly classified as thallophytes
Origin and Etymology of thallus
New Latin, from Greek thallos, from thallein to sprout; akin to Armenian dalar green, fresh, Albanian dal I come forth
First Known Use: 1829
Seen and Heard
What made you want to look up thallus? Please tell us where you read or heard it (including the quote, if possible).