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