alternating current

https://doi.org/10.1351/goldbook.A00252
Current with sinusoidal wave forms; all other wave forms should be termed 'periodic'.
See also:
amplitude of alternating current
Source:
PAC, 1985, 57, 1491. (Recommended terms, symbols, and definitions for electroanalytical chemistry (Recommendations 1985)) on page 1494 [Terms] [Paper]