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abbrev.
-
concave polygon
-
ad hoc
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1 maccabees
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acuminate
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slums
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actinon
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coordinating
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senior
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gaping
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actinon
actinon /ˈækˌtɪnɒn/
noun
-
Any of a series of radioactive elements with atomic numbers 89 through 103
(
actinide
, actinoid
, actinon
)
any of a series of radioactive elements with atomic numbers 89 through 103