Meaning of ACTINIUM
| Pronunciation: | | ak'tineeum
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 WordNet Dictionary |
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| | Definition: | |
[n] a radioactive element of the actinide series; found in uranium ores |
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ACTINIUM is a 8 letter word that starts with A. |
| | Synonyms: | | Ac, atomic number 89 |
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| | See Also: | | chemical element, element, uranium ore | |
| Webster's 1913 Dictionary |
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| | Definition: | | \Ac*tin"i*um\, n. [Gr. ?, ?, ray.] (Chem.)
A supposed metal, said by Phipson to be contained in
commercial zinc; -- so called because certain of its
compounds are darkened by exposure to light.
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