Bot. [ad. mod.L. thallōma, f. thall-us + -oma: cf. rhizome.] = THALLUS.
1875. Bennett & Dyer, trans. Sachs’ Bot., 121. The thallome of Stypocaulon … shows how the apical cell of the lateral shoot grows immediately from the apical cell of the principal process as a lateral protuberance. Ibid., 130. It is now agreed to apply to those vegetable structures in which the morphological distinction of stem and leaves cannot be carried out … (and from which true roots are always absent), the morphological term Thallus or Thallome.
