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Webster's 1913 Dictionary
PERSULPHIDE
PERSULPHIDE
Per
*
sul
"phide, n. (
Chem.
)
Defn: A
sulphide
containing
more
sulphur
than
some
other
compound
of
the
same
elements;
as,
iron
pyrites
is
a
persulphide;
--
formerly
called
persulphuret.