| NOUN | substance | Ac, actinium, atomic number 89 | a radioactive element of the actinide series |
|---|---|---|---|
| phenomenon | AC, alternating current, alternating electric current | an electric current that reverses direction sinusoidally |
| Sounds | ey'siy' | |
|---|---|---|
| Rhymes | absorbency ... Yangtze: 255 rhymes with siy... | |
| Meaning | A radioactive element of the actinide series; found in uranium ores. | |
|---|---|---|
| Synonyms | actinium, atomic number 89 | |
| Broader | chemical element, element | Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |
| Substance of | uranium ore | Any ore from which uranium can be extracted |
| Spanish | actinio, número atómico 89 | |
| Catalan | Ac, actini, número atòmic 89 | |
| Meaning | An electric current that reverses direction sinusoidally. | |
|---|---|---|
| Synonyms | alternating current, alternating electric current | |
| Broader | electricity, electrical energy, power | Energy made available by the flow of electric charge through a conductor |
| Opposite | direct current, DC, direct electric current | An electric current that flows in one direction steadily |
| Spanish | AC, corriente alterna | |
| Catalan | corrent altern | |
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