(Botany)a plant body that is not differentiated into stem and leaves and lacks true roots and a vascular system. Thalli are typical of algae, fungi, lichens, and some liverworts (植)原植体,叶状体,菌体
派生 thalloid adjective 语源
early 19th cent.: from Greek thallos 'green shoot', from thallein 'to bloom'