actinoid
English Dictionary
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actinoid Definition
(n)
any
of
a
series
of
radioactive
elements
with
atomic
numbers
89
through
103
(s)
having
a
radial
form
; "
starfish
are
actinoid
--
that
is
,
they
are
radially
symmetrical
"
actinoid Synonyms
actinide
actinoid
actinon
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