er
English Dictionary
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Letter E
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er Definition
(n)
a
trivalent
metallic
element
of
the
rare
earth
group
;
occurs
with
yttrium
(n)
a
room
in
a
hospital
or
clinic
staffed
and
equipped
to
provide
emergency
care
to
persons
requiring
immediate
medical
treatment
er Synonyms
atomic number 68
emergency room
ER
erbium
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