thallium
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thallium Definition
(n)
a
soft
gray
malleable
metallic
element
that
resembles
tin
but
discolors
on
exposure
to
air
;
it
is
highly
toxic
and
is
used
in
rodent
and
insect
poisons
;
occurs
in
zinc
blende
and
some
iron
ores
thallium Synonyms
atomic number 81
thallium
Tl
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