Main Entry: thal·lus

Pronunciation: \ˈthal-əs\

Function: noun

Inflected Form(s): plural thal·li \ˈthal-ˌī, -ˌē\ or thal·lus·es

: a plant or plantlike body (as of an alga, fungus, or moss) that lacks differentiation into distinct members (as stem, leaves, and roots) and does not grow from an apical point