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1. actinide
noun.
(ˈæktɪˌnaɪd)
Any
of
a
series
of
radioactive
elements
with
atomic
numbers
89
through
103.
Synonyms
group
actinon
actinoid
grouping
Antonyms
zygomorphic
inactivity
Etymology
actinide (English)
-ide (English)
actin- (English)
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