See Also: thallus(medicine)
thallus(dictionary)
thallus(encyclopedia)

thallus (iou)



thallus noun. . E19.
[Greek thallos green shoot, from thallein to bloom.]
Botany. A plant body (as in algae, fungi, lichens, and some liverworts) not differentiated into stem and leaves, lacking true roots or a vascular system, and freq. flattened and ribbon-like.