Main Entry: thal·lus

Pronunciation: \ˈtha-ləs\

Function: noun

Inflected Form(s): plural thal·li \ˈtha-ˌlī, -ˌlē\ or thal·lus·es

Etymology: New Latin, from Greek thallos, from thallein to sprout; akin to Armenian dalar green, fresh, Albanian dal I come forth

Date: 1829

: a plant body that lacks differentiation into distinct members (as stem, leaves, and roots), does not grow from an apical point, and is characteristic of organisms formerly classified as thallophytes