thallus
thal·lus
noun \ˈthal-əs\plural ; thal·li \ˈthal-ˌī, -ˌē\ (audio pronunciation) (audio pronunciation)or ; thal·lus·es
Definition of THALLUS
: 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
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