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Webster 1913 Edition
Yttrious
Yt′tri-ous
,Adj.
(Chem.)
Same as
Yttric
. ☞ Associated with yttrium are certain rare elements, as erbium, ytterbium, samarium, etc., which are separated in a pure state with great difficulty. They are studied by means of their spark or phosphorescent spectra. Yttrium is now regarded as probably not a simple element, but as a mixture of several substances.
Webster 1828 Edition
Yttrious
YTTRIOUS
,Adj.