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Webster's 1913 Dictionary
RUTHENIOUS
RUTHENIOUS
Ru
*
the
"
ni
*ous, a. (
Chem.
)
Defn: Pertaining
to,
or
containing,
ruthenium;
designating
those
compounds
in
which
it
has
a
lower
valence
as
contrasted
with
ruthenic
compounds.