THALLUS

[thal.lus] n, pl thal.li or thal.lus.es [NL, fr. Gk thallos, fr. thallein to sprout; akin to Arm dalar green, fresh, Alb dal I come forth] (1829): a plant body that is characteristic of thallophytes, lacks differentiation into distinct members (as stem, leaves, and roots), and does not grow from an apical point