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die down
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mortified
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acts of the apostles
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injured
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add on
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freckles
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add up
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tear down
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adenine
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passing water
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actinium
actinium /ækˈtɪnɪəm/
noun
-
A radioactive element of the actinide series; found in uranium ores
(
Ac
, actinium
, atomic number 89
)
a radioactive element of the actinide series; found in uranium ores
