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Webster's 1913 Dictionary
FERGUSONITE
FERGUSONITE
Fer
"
gu
*
son
*ite, n. (
Min.
)
Defn: A
mineral
of
a
brownish
black
color,
essentially
a tantalo-
niobate
of
yttrium,
erbium,
and
cerium;
--
so
called
after
Robert
Ferguson.
The Wordsmith Dictionary
The Wordsmith Dictionary