thallious

from The Collaborative International Dictionary of English v.0.48
Thallious \Thal"li*ous\, a. (Chem.)
   See {Thallous}.
   [1913 Webster]
from The Collaborative International Dictionary of English v.0.48
Thallous \Thal"lous\, a. (Chem.)
   Of or pertaining to thallium; derived from, or containing,
   thallium; specifically, designating those compounds in which
   the element has a lower valence as contrasted with the
   {thallic} compounds. [Written also {thallious}.]
   [1913 Webster]
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