- actinum
- Ac Ac n.
1. the chemical symbol for {actinum}, a radioactive element.
Syn: actinium [WordNet 1.5]
The Collaborative International Dictionary of English. 2000.
actinum
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Ac — n. 1. the chemical symbol for {actinum}, a radioactive element. Syn: actinium [WordNet 1.5] … The Collaborative International Dictionary of English
